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09/15/24 11:02 AM #497    

Allison Oakes (Sabraw)

Dear Bill, Always good to receive an email from you. You do contribute so much great data on numerous subjects.

I enjoy your amazing information and detailed information on music. Music of our younger years that continues to be a significant 'head liner' today for many people. I do enjoy the tunes of years past. 

Since I have enjoyed various music available on UTUBE and now just plug my JBL-FLIP6 (available at Best Buy for about $70.00) My music interest have turned to various music selections. Especially due to the FLIP6 - I just select the music of choice via UTUBE, turn on my FLIP 6 and Oh-La ,,,,,,, I take the Flip-6 outside, upstairs....etc and hear so very much. Since I have previously mentioned that my hearing sucks/i.e. sorta deaf.... I 'm enjoying tunes perhaps louder than most people prefer  which is A/OK with me.  Meditation to ROCK & Roll - its all available in a very simple manner. Not sophiscated or expensive.  In the past couple of years I have enjoyed HAUSER. .....scope it out and let me know. 

Our class reunion is almost here. I will not be attending. My ability to hear clearly what is being said is uncomfortable for me. Although I now have a Cochlear inmplant. Words that are being said are mumbled. I do hear  fairly well  while enjoying a cocktail with a couple of friends in a none noisy enviornment.  AH - its just life and the mixed issues of one's body, aging and Life in General. 

Bill, I pray you continue to hang in and do ok. Today is Sunday. My special day that I spend time in my Back-40 to meditate and give thanks to our maker.....

Thank you again Bill - Allison

 


09/15/24 12:47 PM #498    

 

Bill Kelso

Dear Allison

I am so sorry to learn that you lost your hearing. But I am also glad to know that you had a cochlear implant and that you are doing much better today.

It is great that you did not let you handicap keep you down and that you were able to take advantage of all the improvements in medicine today to regain much of your hearing.  

I know you would have liked to go to the reunion. But with all the people in one room at the reunion, it could be difficult to hear anyone with all the background noise. 

Like you I can’t make it either. I get too exhausted quickly and an unable to make long trips let alone last through a four hour lunch. But fortunately David and the reunion committee do a good job providing us with pictures of the event. That way we can both attend the reunion in spirit if not in person.

In any case you take care. I am very happy that you are doing much better these days. In cases like this I am often reminded of something Dennis De Cuir said to me ten years ago when we reconnected after a hiatus of some 50 years. He said he thought we lived in unusual times. Of all of our classmates Dennis has this  unusual ability to coin a phrase that seems to capture the very essence of a moment. 

When I think some 65 years ago Roger and I and you were hanging out in your backyard or living room listening to some Doo Wop group like the Drifters or the Penguins, I would never have imagined that 6 decades later we would be able to compare notes on getting old. Dennis was right these are unusual times. But these are unusual times that are also enjoyable times. 

Despite all the limitation of getting older, you are hanging in there and getting on with your life. That is great news. As is always the case, I wish you the best.

 Bill

 

 


09/18/24 07:20 PM #499    

 

Barbara Alexander

Hello Fellow Graduates of McClatchy Class of '63. I'm sorry to say that I won't be attending our reunion this year. I'd planned on going but life has interfered. I hope you all have a great time and am looking forward to the photos! Thanks to all of who who give their time organizing and planning. You do a wonderful job. I really enjoy this forum so thanks to David Grandstaf for all his hard work. Until I see you next year stay healthy and happy, and be sure to party, party, party at the reunion!! 


09/21/24 05:05 PM #500    

 

Dennis De Cuir

Barbara,

Sorry you couldn't make it. It was lots of fun. Spoke to Sally for a good long while. Hope you're well. We are fine.

Best,

--Dennis

 

 


09/22/24 10:58 AM #501    

 

Roger Kircher

I enjoyed the 61st very much and looking forward to next year. Sutterville, Joaquin Miller, Cal and McClatchy friends and aquaintences there. Thanks to all volunteers and participants. 👍

 


09/22/24 06:36 PM #502    

 

Barbara Alexander

Hi Dennis. Yep, I was sorry to miss out on the festivities. It would have been fun to reminisce with you and Sally about our days as the primier folk group at McClatchy HA! A lot of treble cleffs have gone under the bridge since then 🎶 so my memories are hazy but I do remember our trip to the Berkley Folk Festival to sing "We go. A'marchin' off to War" for Pete Seeger. Ah, the good old days. Take Care, Barbara


10/19/24 04:15 PM #503    

 

Bill Kelso

                                     A New Species of Man

I thought our class might be interested in a fascinated article in the Wall Street Journal about how mankind may soon undergo a fundamental change in the way we interact with one another. Among physical anthropologists there is the belief that because of advances in technology and Artificial Intelligence we might be on the verge of creating a new species of human beings.

But we should not be surprised by this change. In just the past 2 million years, physical anthropologists have discovered 8 species of humans who at one time or another lived on planet earth. For instance, 400,000 years ago an earlier form of human beings called Homo Neanderthal man appeared on the scene and lived until about 40,000 years ago. During this time on earth, Modern Homo Sapiens (which includes us) developed around 200,000  to 250,000 years ago and shared the planet with this early version of human beings for about 160,000 years.  Eventually modern humans prevailed as the declining number of Neanderthals finally died out somewhere in southern Spain by the Mediterranean sea.

However, by the end of the 21st  century we may evolve into yet a ninth and newer form of human being that we may called a cyborg or a transhuman that may be a combination of human biology and silicon chips. Maybe another name for this new species will be Homo Silicon Sapiens. In the process, Modern Homo Sapiens like us will become an extinct species studied by physical anthropologists for ou primitive life styles and means of interreacting with one another. What is most interesting is how this new species of humans will communicate with other member of its species.The following articles describes how this form of human behavior may be both fascinating and scary.

This article is also interesting because it suggests you ought to enjoy your classmates while you can. In the future the people who attend McClatchy may be nothing like the people we grew up with.

Are You Ready for a Brain Chip? It’ll Change Your Mind

These implants will help us do amazing things. The downside is that they may destroy humanity.

A x-ray of a skull with a chip in the brain

Description automatically generated

Smartphone ownership is nearly universal. It isn’t mandatory, of course, but you’d be seen as an eccentric if you didn’t have one. Rejecting smartphones means you’re old-fashioned, possibly a bit of a crank.

There is very little that is completely independent of these devices. So, yes, you can do without a smartphone. But it isn’t easy. It won’t be long before there is a similar concerted effort to make brain-implanted chips seem normal. It is a matter of years, not decades. These won’t be chip implants permitting paraplegics to regain their independence. These will be implants marketed to everyone, as smartphones are now. And if you decline to have a chip grafted onto your brain, you’ll be a backward, out-of-touch misanthrope.

The benefits of brain chips will be vastly beyond what external devices offer today. We will be able to take “photos” of anything we see with our eyes, just by thinking. Ditto video—in 3-D. We will be able to send messages to friends by thinking them, and to hear their replies played in our minds. We’ll have conversations with friends remotely, hearing their voices and ours without actually having to speak. We’ll be able to talk to anyone in any language. We’ll be able to remember an infinite amount of information, to retrieve any fact by asking our brain chips. We’ll be able to pay for things without carrying a wallet or a phone. We’ll be able to hear music piped directly into our brains. To watch movies. To take part in movies. To be totally entertained in new virtual worlds.

We’ll even be able to go to sleep quickly, whenever we want. And we’ll be able to get counseling instantly if we ever have suicidal thoughts.

We’ll be able to get advertising pumped directly into our brains, to have images hover before our eyes that we can’t turn off—except for those opting for the premium subscription. Our memories will be organized for us by artificial intelligence under policies crafted by experts who will have society’s best interests at heart. We won’t have access to information that might be, say, Russian propaganda. If we have criminal ideas, or perhaps just countercultural notions, they will be referred to the proper authorities before it’s too late.

In other words, it will be every dystopian sci-fi drama rolled into one.

How helpless would we be if tomorrow the internet were suddenly and permanently turned off? Think how much of our lives, memories and relationships is already stored and remembered for us online. We don’t know our best friend’s phone number. We don’t even know how to spell. We don’t need to.

But transhumanism—transcending human “limitations” through technology—becomes dangerous when a human, deprived of that technology, would be not only inconvenienced but unrecognizable. 

Imagine a world in which not only our friends’ phone numbers but all our experiences with them, and even their names and their faces, are remembered for us and stored remotely on servers somewhere—available for us at any time. Until they’re not. What would be left of a generation of humans who had never had to use their own memory or do any of their own reasoning until, one day, all the chips were turned off? Would there be any human left, or only an empty shell?

It doesn’t take an atomic bomb to destroy humanity. There are other ways. If you don’t get a brain chip, you’ll have a hard time competing or even living in the modern world. You won’t be able to retain endless information, to pick up new skills instantly, to communicate with anyone anywhere. You’ll be out of date. You’ll be an obsolete human. You might be the last human. So maybe you’d better get the brain chip after all. Remember, it’s optional.

Mr. Gelernter is manager of RG Niederhoffer Digital and an expert in artificial intelligence and machine learning.

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11/12/24 07:03 AM #504    

 

Bill Kelso

Origins of American Music : A Visual, Oral and Historical Account        

I was thinking that if some of our classmates like music, they  might be interested in taking a visual tour of America’s musical traditions and the cities that created those traditions.  In fact this musical tour might interest our class for several reasons.

                               Where Musical Genres Originated

First of all, as mentioned in an earlier post, there are three way to view music. If you are a musician, you may be interested in the melody or rhythm of a particular song. A second alternative is to study the evolution of the different musical genres and to analyze how one genre of music is different from other forms. A third alternative is to study the history of music because it tells you a lot about how the various ethnic and racial groups dealt with the obstacles they faced in coming to America. 

As we shall soon see, if we want to pursue our second approach to music which is the study of different music genres. we have to recognize that different forms of music have a historical link to particular cities. The various genres of American music are unusual in that they primarily originated in the south in the first half of the 20th century. For instance, while Jazz originated in New Orleans, the Blues developed in the Delta region of Mississippi, R&B as well as Rock and Roll were created in Memphis and Country music emerged in Nashville Tennessee.

In the latter part of that century the northern city of Chicago also played an important role in enhancing and even transforming America’s unique form of music called the blues, while the southern part of the Bronx created yet another brand new genre of music which today is called Hip Hop and Rap music. To fully understand the evolution of American music, it can be helpful to take a musical tour of the cities that did so much to shape popular culture.

                      A Second Reason to Learn about America's Musical Heritage

Besides visualizing a look at the origins of American music, a second reason for learning about the urban origins of American music is that it may interest our classmates who want to hear different types of bands. I got this latter idea from a conversation I had several years ago with our very congenial and affable  classmate Bonnie DeAngelis who also shares an interest in popular music.  When we happened to exchange Christmas greetings at that time, Bonnie mentioned that she and her son had gone on a cruise that featured a battle of different bands. 

When I read Bonnie’s letter, I thought what a great way to listen to different forms of music. However, the drawback of this approach is that it was unclear how often the cruise line would repeat its unique cruise with its unusual form of entertainment.

An alternative is to pay a visit to a city like Memphis, Nashville or New Orleans in which music is a major part of its urban DNA.  In these cities there are distinct musical districts with numerous musical clubs playing great music every night of the week. Beside seeing where different forms of American music originated, visiting these cities is an excellent way to entertain yourself.  

In case you had an interest in learning a little about American history as well as hearing great music, I thought we could maybe take a quick visual tour of the cities and streets that gave us so many distinct musical styles.

                                   Five Major Musical Cities in America

Below is a list of major cities that created American music, their streets & famous musical arenas. If you want to learn more about American music it is worth a visit to 1) Northwest Mississippi and highway 60, the so called Blues highway, 2) Memphis and Beale Street, 3) Nashville and Broadway, 4) New Orleans and Bourbon Street and 5) the South Bronx and Sedgwick Street.

1.North west Mississippi,                      Home of the Blues

Clarksdale and Highway 60                      Almost Exclusively Blues Night Clubs

The Club Hollywood

 

2. Memphis                                            Home of Rhythm & Blues & Rock and Roll

 Beale Street                                           A Diverse array of Musical Clubs

                                                                                          

3. Nashville                                            Home of Country Music

Broadway                                                Today there are  Night Clubs with every form of Music

Ryman Auditorium                                   Nashville is becoming the musical capitol  of the US.                                                                        

4. New Orleans                                      Home of Dixieland Jazz

Bourbon Street                                       Primairly Jazz Night Clubs

Preservation Hall

 

5. South Bronx                                       Home of Rap & Hip Hop Culture

Sedgwick Street                                       Not Much of a Night Club Scence

                                                               At times there are large block parties

However as we shall see Rhythm and Blues is the outlier when it comes to the origins of this distinctive form of American Music. In contrast to Jazz, the Blues and Country, Rhythm and Blues originated in three distinct locations, one of which is in Memphis, and the other two are Motown in Detroit, and Atlantic Records in New York.

Of the above options, this post will concentrate on just two areas; the area of Northwest Mississippi which is the birthplace of the Blues and second the unique city of Memphis which is one of the birthplaces of Rhythm and Blues as well as the Home of Rockand Roll. While previously we posted material on different forms of Jazz and Doo Wop music, in this post we can analyze more recent forms of music that were popular from the late 1950s through the early 70s. The city of Memphis is a good place to visit.Of all the cities in America, no city has a richer musical history than Memphis.

Before visiting the home of Elvis Presley and the origins of Rock and Roll, let’s start by visiting the Delta region of Mississippi and examine the rise of the Blues followed by the later development of Rhythm and Blues in the city of Memphis. We will then finish our initial musical tour by studying how Sam Philips of Sun Records which is also in Memphis encouraged Elvis Presley and later Jerry Lee Lewis to develop rockabilly, a new form of music that fused the country songs of Nashville with the rhythms of black music. As we shall see Beale Street, which is the musical heart of Memphis, is where Elvis hung out as a young boy listening to different tyles of music. It is also the area where he learned to fuse different musical styles together to create the new genre of music we today call Rock and Roll.

                                                                 (1)

                                                The Origins of the Blues

Of the many forms of Black music that arose in the 20th century, the Blues was unique in that it originated in the Delta region of north Mississippi. This was the original home of the cotton plantations during slavery. When slavery ended many former slaves worked as sharecropper in those same field until finally around 1950s the picking of cotton was automated and done by machines. 

During the early 20th century, the sharecroppers developed the Blues to describe their poor working conditions.. Their music tried to recount the hardships they encountered picking cotton in a harsh and oppressive segregated society.  While the Blues originated in northern Mississippi, most of the blues singers have today migrated to Memphis to play on Beale Street. If you watch the following video by Marc Cohen, you can see one of the last spots to hear the Blues in Mississippi besides the city of Clarksdale is the club called Hollywood. It is a small run-down place in northern Mississippi that often attracts some incredible musical performers Periodically you can also hear good blues in Clarksdale but it is pretty much a hit or miss occasion as to the quality of the musicians as the best Blues artists have moved to Memphis. 

Finally if you are interested in American history, it may interest you to know that many slave plantations have been turned into motels where you spend a night in a former slave’s cabin, complete with a minibar

The following video is worth viewing as it shows the 1) birth of the Blues in Mississippi, and the 2) Growth of Rock and Roll with Elvis and Sun Recording Studio

                                                 Marc Cohen Walking in Memphis

The following videos also gives you a good insight as to why Mississippi was the home of the cotton plantations. It also historically explains how poorly the sharecroppers were paid which lead the residents of the Delta to create the Blues. 

                                            Listening to the Blues today in Mississippi

                                               A Blues Club in Clarksdale Mississippi

                                        A Contemporary View of North West Mississippi

                                                        The Home of the Blues

                                            A Historical View of North West Mississippi

                                                        History of the Delta

Despite its ancient history, today the Blues is very controversial in the black community. First of all, in the history of the Blues, the music developed because the musician Robert Johnson, the originator of Blues, allegedly sold his soul to the Devil in return for learning how to play the guitar. As a result, many black churches argue that the Blues is Devil’s music and discourage its congregation from listening to the Blues. 

Secondly, more recent musicians like James Brown and Rappers reject the music as they don’t want to dwell on the limitations of black history. They also reject what many feel is a fatalistic attitude towards their plight as African Americans, an attitude that Soul Music has tried to rectify.

Finaly, many black musicians think the music is too bland. It basically started out as one musician playing an acoustic guitar with limited instrumentation. As black musicians began to migrate up highway 60, which is known as the Blues Highway, at first to Memphis and later during the 20s to Chicago, they tried to make the music more sophisticated by expanding the number of instruments playing the music as well as enlivening the Blues by emphasizing the rhythm and tempo of the music. In place of the acoustic guitar, Blues musicians began playing the electric guitar, which has a more percussion tone to it which enhanced the overall sound of the music.

                                                                   (2)

                                           The Origins of Rhythm and Blues

When many of the Blues musicians returned to Memphis, and settled in Memphis they created a second form of African American music that we today call the Rhythm and Blues. While the Blues had existed since the turn of the 20th century, the development of Rhythm and Blues in America began in the late 1950s.

R&B is an unusual Name for a Genre of Music

In many ways the development of R&B is unusual in that its very name, Rhythm and Blues, combines an attitudes towards life (The Blues) with one of the four main components of Music (Rhythm). To get a feel for how R&B had increased the tempo and rhythmic nature of black music, compare the following two videos.

As Sam and Dave, who are two of the earliest R&B singers, follow the Blues singer Howling Wolf, you can see how their stress on Rhythm overwhelms any Blues elements in their music. And that video is more revealing when you realize that the Blues music of Howling Wolf in England has some elements of R&B already mixed in with his traditional Blues’ sound. 

                                                  Howling Wolf Blues Singer

                                                     Sam and Dave Singing

With Sam and Dave you also want sway to the beat and the dance steps of the music, two elements that remade the Blues into the Rhythms and Blues. The opening scene of the video with its stress on the drummer and his pounding beat tells you right away this is going to be a very different musical experience from that of the Blues. In a nice touch, notice how Sam bops his head towards the end of the video with every beat of the song “I’m coming,” magnifying the rhythmic nature of the song. At the end of this song you also have another great example of African American singers copying the shout and answer tradition of  black gospel music. As the above songs comes to an end, Sam and Dave constantly shout and respond to one another’s rendition of their popular tune. 

The above video also explains why R&B music became so popular. While an audience may be prone to sit and listen to the Blues, they are likely to want to dance and sway to R&B. The pounding beat and rhythm of Sam and Dave also explains why so many teenagers in our era found Rhythm and Blues so exciting and preferred it to the more mellow tunes of their parents. If you wanted to be slightly rebellious in the 1960s, and periodically reject the conformity of a middle class life, what better way than to listen to and even dance to singers like Sam and Dave rather than crooners like Perry Como or Rosemary Clooney,    

However, as soon as the Blues went so far to give equal billing or even preeminence to Rhythm many of its fans felt that the emotive or blues side of the music had been too severely diminished. If we have time later, we will try to show how Soul Music tried to redress this problem with Rhythm and Blues so that the soulful nature of Black Music became the dominant and significant partner in R&B music. 

As African American music evolved, there was an initial focus on the despondent nature of life or the blues which in turn was followed by a deemphasis on the emotional nature of the music and a stress on rhythm which eventually elicited a “soulful” backlash. In simpler terms, the 1) Blues evolved into 2) Rhythm and Blues which precipitate a musical reaction which led to the creation of 3) Soul Music an intense and very personal form of music.                    

The Important Role played by Stax Studio

The creation of Rhythm and Blues’ stars like Sam and Dave owes its existence to two unusual siblings, Jim Stewart and Estelle Axton who owned a record shop in Memphis called Stax. While both of the owners of Stax Studios were white they both loved black music. In a major contribution to the creation of a distinctive American musical culture, Jim and Estelle decided to start recording various black artists in the area creating  in the process Rhythm and Blues.  This development in Memphis coincided with the rise of Motown in Detroit and Atlantic Records in New York.

While Motown was noticed for its silky smooth sound, the Stax label was notable for its more edgy and daring music. Besides Sam and Dave, Stax records was famous for Otis Redding, Eddie Floyd, Booker T and the MGs and Issac Hayes.

                             Video of Stax Music

Ironically enough, when Stax sent its artists out on tour, many of them did not want to perform along with Sam and Dave, who always ended up stealing the show. 

Otis Redding, who was originally from Georgia, has some relevance for people from California as his most famous song was about sitting next to the bay in the city of San Francisco. While we mentioned that R&B generally tended to downplay people’s emotional state, Otis Reding was something of a holdover from the earlier Blues period. If you listen carefully to the lyrics of this song, it is a despairing song in which a person has lost both a sense of direction or hope for the future. Or as he puts it, “I have nothing to live for, nothing comes my way.” 

                                   Video of Otis Redding Singing By the Dock of the Bay

While Otis Redding and Sam and Dave were initially the major stars of Stax, when Otis Redding died in a plane crash, Issac Hayes became the leader of the group. He quickly redirected the songs of the studio and R&B music from a fatalistic resignation to an image of black accomplishment. 

For instance, Issac Hayes quickly became famous for his theme song for the movie Shaft. Shaft represented a symbol of black masculinity and sexuality that had been lacking in the music of the Delta. In contrast to the fatalistic mood of resignation of much Blues music as well as that of Otis Redding, Stax under Hayes leadership developed a more edgy version of R&B that stressed the empowerment and strength of black men. 

Besides rejecting the depressing view of Blues music, Stax also distinguished itself from Motown’s version of R&B which stressed love songs. While not neglecting broken relationship in their music, Stax in its later years also dealt with social issues like drug use and gang violence. Similarly Stax, under Issac Hayes’ guidance, developed a more assertive version of black life than that of the Delta region in which the black community overcame any sense of the Blues by resolving its own internal problems. 

                                             Theme  song from the Movie Shaft

The following video, a trailer from the movie Shaft, is a very raw film clip tha has an over abundance of the F word, the S word and the N word. But if you want to get a feel for the  often contentious political climate in the country around 1971, this movie explains the new assertiveness of studios like Stax under Issac Hayes.

                                               Trailer for the original Movie Shaft

                                                                     (3)

                                                The Origins of Rock and Roll

But the contribution of the city of Memphis to American music was not confined to just the Blues and R&B. Of all the cities that played a part in creating America’s unique music, none rivals Memphis for its shear creativity. By the early 1950s besides fostering the Blues and R&B, it also helped spawn a whole new genre of music that we today call Rock and Roll.

The City of Memphis

To gain an overview of what Memphis is like, watch the following video of Memphis. In particular pay attention to Beale Street, the street where Elvis hung out as a teenager and got the idea of combining country music with that of Rhythm and Blues.

                                                     Video of Memphis

To appreciate why Rock and Roll originated in Memphis we have to realize that the city lies between Nashville in the east, which is the home of country music and northern Mississippi in the south which is the home of the Blues.  In addition, many of the residents of Memphis were members of poor Scotch Irish families who had fled the Appalachian hill country of Kentucky and Tennessee looking for work. 

For members of Scotch Irish families, country music was the music of their ethnic heritage. Unfortunately, most Americans looked down at the Scotch Irish and derisively called their music “Hillbilly” music, the music of the Scotch Irish from the Hills of Appalachia.  

To gain more respect for their cultural heritage, many Scotch Irish, who had fled to the oil field of Texas seeking work, soon insisted that their music be called “Country Music” or the music of the Cowboys. Before long their efforts to enhance the status of their music paid off. While country music began as the music of the Scotch Irish it eventually became the music of working class as it was embraced by the workers of the oil fields of Texas, to the Coal Mines in East Virginia, to the Oakies in Southern California to the industrial plants in the heartland of America.

In growing up in Memphis, poor Scotch Irish kids from working class families like Elvis, Carl Perkins and Johnny Cash, were thus familiar with the the country music of their families, a type of music which was part of their ethnic heritage. At the same time, they were introduced to the Blues of the Delta and the new sounds of R&B that originated in Memphis, a type of music that had undoubted appealed to these aspiring young musicians seeking to create a new type of sound. It is easy to understand how they absorbed all of these new styles of music as many of them spent an inordinate amount of time on Beale Street, the musical center of Memphis. 

The Important Role Played by Sun Studios

But while individuals like Elvis were exposed to a variety of new musical styles, he as well as other young singers in the Memphis were eager to create something new. Fortunately for them there was a small struggling recording studio call Sun Studio which had reordered Blues stars like BB King, Howling Wolf and Muddy Waters but was willing to produce new forms of music.  Sam Philips who was the owner of Sun Studios, was thus intrigued one day when a young kid named Elvis walked into his studio to record a song for his mother. What amazed Philips was that Elvis, a white guy who liked country music, often sounded like and danced like black artists. Because Philips was eager to expand his business, he quickly began to promote Elvis’ new style of music.

If Stax had Sam and Dave who could sing and dance circles around the other artists at that studio, Philips and Sun Records had Elvis who could likewise win over audiences with his equally exciting unique dance steps and music. Before you knew it, Sam Philips, who had a major impact on American culture, develop a whole stable of young singers who went on become major celebrities in America in the 1950s and 60s.

                                               Where Rock and Roll Began

What is also remarkable about Sam Philips and Sun records is that he provided an opportunity for 5 young Scotch Irish kids from poor backgrounds to become incredibly famously and incredibly wealthy.  Below is a very famous picture of what people called Philip’s million dollar quartet as one day all of Sun’s major stars except Roy Orbison happened to be in the studies. To kill some time they all began to sing together. 

                        Elvis, Lewis, Perkins and Johnny Cash, 4 Scotch Irish Singers

The early videos of Philip’s famous singers, Presley, Perkins, Cash, Lewis and Orbison are also instructive in that easily demonstrate the influence of country music on these early Rock and Roll singers. As we shall see in a following post, when the above generation got older, the Rockabilly nature of Early Rock and Roll quickly disappeared. As Memphis was no longer the only city creating this new type of music, Rock and Roll went through a major change in orientation.

How Rock and Roll Music Began to develop Sub Genres

When Dick Clark’s Bandstand took off in the late 50’s and 60s in Philadelphia, Pop Rock replaced Rockabilly.  In place of poor Scotch Irish kids from the south, Dick Clark promoted young Italian kids from South Phillip like Fabian, Frankie Avalon and Bobby Rydell who dismissed the country influence of early Rock and Roll. This new sound was even called the Philadelphia sound. 

By the 1980s there were so many new genres of Rock and Roll, that it was hard to find a common thread tying them all together. The Psychedelic Rock bands of San Francisco such as the Grateful Dead and the Jefferson Airplanes sounded nothing like Dicks’ Clark’s proteges let alone the Rock and Roll artists from Memphis.  

But before we later discuss these new developments in popular music, perhaps we should pause for a moment and just enjoy the great early Rock and Roll tunes that came out of Memphis.  The following artists were responsible for the growth of rock and roll during out teenage years. We were lucky in that we lived during the fifties which were a golden age of American music that forever changed our country’s popular culture.

                                      The Most Famous Rock & Roll Stars of the 50s

                                       Elvis singing You ain't nothing but a Hound Dog

   This video is also interesting because of its dueling guitars  that occurs in the middle of the song.

                                       Bruce Springsteen accompanies Roy Orbison on guitar

                                             Roy Orbison singing Pretty woman

                                 The unique piano playing by Lewis is also worth watching

                                         Jerry Lee Lewis singing Great Balls of Fire

                                          Cark Perkins singing Blue Suede Shoes

Finally besides listening to the above artists, we can complete our city tour of the Delta area and Memphis by visiting Elvis’ home Graceland. Whether you are visiting the living room, the listening room or the jungle room in his private residence, Elvis’ living quarters has attracted more music lovers than the famous Stax and Sun Recording Studios of Memphis.

                                                                 (4)

                                             Graceland: The Home of Elvis

                                             Video of Elvis’s Home Graceland

                                            Comprehensive Tour of Graceland

Just in case you would like to listen to one more good tune before you stop reding this post, here is a one more song celebrating Memphis, one of the musical capitols of the US. 

                                   Video of Johnny Rivers singing about Memphis

 

 

 


11/14/24 05:23 AM #505    

 

Roger Kircher

Good article Bill. Thanks for your post. :)

 


11/16/24 04:58 PM #506    

 

David MacDonald

Hey Bill, thanks for your contributions regarding the history of the evolution of music in America.  I have very much enjoyed the information that you have been sharing. I do miss however the contributions made by tin pan Alley and by the Broadway musical theater. I've spent most of my life involved with Broadway musicals and find the uniqueness of that music to be something very special.  Thanks again, Dave


11/16/24 05:00 PM #507    

 

David MacDonald

That was Tin Pan Alley. Sorry for the earlier misprint.


11/17/24 08:18 AM #508    

 

Bill Kelso

Dear David

It was nice to hear from you. You are absolute right that Tim Pan Alley and the American musical have played a major role in shaping American music. In that sense by focusing just on R& B and Rock and Roll I have given an incomplete picture of the development of music in America. 

I have a nephew who is a musicians and like you he constantly talks about Tin Pan Alley and also the Brill group all the time. I guess I should have listened to him more about what many musical historians refer to as “Great American songbook.”

Also David it is great to know that you are involved with Broadway musicals. Your productions have undoubtedly enriched the cultural offerings in Sacramento.

Unfortunately I did not know until recently that you were producing Broadway type shows in Sacramento.  To be honest the first time I heard that you were the creative force behind the production of quality musicals in Sacramento occurred about a year and a half ago when Sue Pfiefer wrote a very nice “In Memory” comment for Frank Nugent who evidently provided security for your show ”The Best of Broadway.”

If I lived in Sacramento, I would have made a point to attend your plays.  But I think your comments raise an interesting point about how we are educating young kids. I know McClatchy had a first rate music department which Kathy Peron’s father helped developed. But unfortunately, I never took any musical courses when I was at Cal or CK. In many ways I wish our high school had insisted that everyone have at least one course on either the fundamentals of music or the history of music.

By producing musicals for high school students, you have probably enhanced the way the city currently educates kids.  You thus deserve a lot praise for filling a void or supplementing the schools current musical offerings. In introducing kids to the “Best of Broadway” you have probably introduced them for the first time to this unique American invention.  I knew when I was in high school, I had no idea what a Broadway musical involved.

While I have no musical talent, I think our class including myself would have benefitted if we had been required to learn something about music. Even if we could not play an instrument, we would have been better able to enjoy and understand what we were hearing. Certainly now that I am older and have plenty of free time I get a lot of enjoyment listening to all kinds of music

I know from several exchanges of e mails with our classmates over the past several years including Susie Arnold, Diana Helms, Bonnie, Linda Mancebo, Allison Oakes, and Steve Lindfeldt that lots of our classmates really enjoy music. The more diverse the opportunities to listen to different varies of good music, the greater their chance to enjoy one of the great pleasures of life. 

I was wondering if  the public schools in Sacramento have ever debated requiring all kids to take a course in music as part of their general education. You could argue that to have a well rounded education, everybody should know something about music. 

If you are interested in history, people should also know that Americans have created so many new genres of music. David is absolutely right that a great musical education would have also included material on the American musical and the Great American songbook. Afterall, besides creating Rock and Roll and R&B, the development of the musical is another unique contribution that the United States contributed to world music.


11/20/24 07:36 AM #509    

 

Bill Kelso

I thought our class might enjoy this video of a bunch of high school drummers who won a talent show at their high school in Florida. It takes a while to develop but it is very entertaining.  While amusing I also  think this video shows that the younger generation is less inhibited and more willingto try to shock people during a performance than our generation would be.

 Teenager Drummers who won a Talent Show in Florida


12/09/24 07:11 AM #510    

 

Bill Kelso

Christmas Music

Since Christmas will soon be on us, I thought I would send our class a collection of popular Christmas songs. Naturally I want to wish everyone a happy holiday season. Hopefully the following songs will bring some degree of cheer to your families this holiday season. So to the wonderful McClatchy class of 63, have a Merry Christmas.

In picking videos of famous Christmas songs, I also though people might be interested to see how the country has altered the way it celebrates our most popular holiday.

In case you are interested we can see how Christmas music has undergone four major changes over the past century partially reflecting major changes in American society.

1)The First phase: 1930s to 60s. The Classical Crooner.           

The first identifiable tradition of popular American songs celebrating Christmas generally developed around the late 1930s and lasted through 1960s. This music was basically sung by classical crooners singing songs like ”White Christmas.” 

                                 Tin Pan Alley and the Great American Songbook

As David MacDonald has perceptively noted many of these songs were developed by an institution called Tin Pan Alley, a named used to describe a building in New York which was the center of American music from the end of the 19th century to the 1940s. Tin Pan Alley got its name from the large number of songwriters churning out new tunes by playing the piano at the same time who created a racket like a Tin Pan alley.

While the composers wrote tunes for rag time or jazz performance, they also turned out many popular tunes that were used in Broadway plays, Hollywood musical or popular holidays. These tunes soon became known as the Great American Songbook, a collection of American standards that dominated the American scene until the rise of R&B and Rock and Roll in the 1950s. As David has noted their influence on American music was significant. While the institution of Tin Pan Alley no longer exists, many composers continue to turn our songs that reflect this heritage including post WWII Christmas songs. 

Among our parents the most popular Christmas songs were sung by crooners like Bing Crosby, or Rosemary Clooney. The songs were generally narrative songs about every day events such as the weather and the possibility of a “White Christmas” or “A Winter Wonderland.” Other songs celebrate family gathering during the holidays such as “It is a Wonderful Time of the Year.” Everybody who has a record player also undoubtedly remembers Nat King Coles’ Christmas lyrics about “chestnuts roasting on an open fire, with Jack Frost nipping at your nose.”

In all of these songs the music was mellow and relaxing, celebrating a placid and peaceful time to reunite with you family. Rather than stirring up emotional feeling about love ones, the mood was serene and peaceful, downplaying any sense of emotional conflict. 

                                     Crooners singing It's a White Christma

                                  Andy Williams It's the most wonderful time of the year

                                         Amy Grant singing Winter Wonderland

                                             Nat King Cole The Christmas song

2)The Second Phase: 1950s to 80s. The Age of Rock and Roll 

If the first phase of Christmas music lasted from the 1930s, a second phase began in the late 1950s and lasted until the 1980s with the development of R& B and Rock and Roll music. After we graduated from high school increasingly Christmas songs incorporated elements from this new music scene by becoming livelier and more rhythmic in nature. 

                                          The Impact of Rhythm and Rock and Roll

While Crosby’s “White Christmas” had been the most popular holiday song before the war, by the 1950s Brenda Lee, primarily a country singer, produced two pop rock versions of Christmas music that soon dominated the market. The first song by an elderly Brenda Lee was entitled “Rock around the Christmas Tree,” and quickly caught on with a generation that was now listening to Rock and Roll. In the second record, which was equally popular, a young version of Brenda Lee sings “Jingle Bell Rock,” another tune that became popular because of its catchy rhythm.

                                      Brenda Lee singing rock around the Christmas tree

                                                          Jingle Bell Rock

3, The Third Phase. The Rise of Soul Music and The Impact of Personal Feelings

In the third phase of Christmas music that began around the late 1980s to the turn of the century, Christmas songs which were still influenced by rock and roll, also became much more individual, and personal in nature. Perhaps influenced by the development of Soul Music with its stress on emotive songs that reflected a yearning for a lost love, the lyrics of the music became more intense in its outlook. 

More than any other singer Maria Carey personified this new trend in holiday music. In a variety of settings from the Lighting of the Christmas Tree in Washington D. C. to Rockefeller center in New York Maria Carey became the premier entertainer for the holiday season. 

While Brenda Lee’s songs had supplanted Bing Crosby “Winter Wonderland” in the 1960s with its more upbeat rhythms, by 1990s Maria Carey’s song “What I want for Christmas” became the dominant holiday song in the US.  While Brenda Lee emphasized the rhythm of rock and roll, Carey emphasized instead an overly romantic form of Christmas music that centered on an individual's desire for an intimate relationship with someone.  In the 90s as opposed to the 60s, individual sentiment had replaced rocking around the tree as the new essence of Christmas music. 

If we refocus our attention even further back in time to the 1940s and 50s as opposed to the 60s we find an even more dramatic change in Christmas songs. 

In place of the more mellow and abstract songs of that earlier era that celebrated a “Winter Wonderland” or strong family ties between parents and children, American holiday music was now becoming more individualistic and somewhat estranged. Talk of close family reunions disappeared from Christmas music. Increasingly intense feelings of individuals fearful of being abandoned or ignored replaced serene reunions or quiet family get togethers. In roughly 40 years it seemed that the Christmas holidays had become more about expressing the yearnings of a lonely individual rather than the joys of a close-knit family. Unfortunately, themes of either being alone, or ignored or the fear of unrequited love became the backdrop of most Christmas songs composed in the 1990s.

To illustrate we will look two different versions of Maria’s song that will focus on her active yearning for her present lover. While the music of Bing Crosby had no hint that things could go wrong in the holiday seasons, Carey’s song is more about hope and desire rather than the certainty that her relationship will work out.

                      Traditional Hollywood Musicals and their Impact on Christmas

But the first video of Maria Carey is also important because it combines two very different traditions. As noted above while it embraces the soulful nature of much 1990s American music, Carey’s video also embraces another musical tradition from the Hollywood musicals of the 1930 which is the Kaleidoscope dance pattern.

You might be interested in this point because several weeks back David MacDonald perceptively pointed out that Americans musicals have always been a part of our musical heritage. When I looked at Maria Carey’s Christmas program I realized how perceptive David is. 

Back in the 1930s, there was a very famous movie director named Busby Berkeley who became very popular during the depression because of his Hollywood musicals. While much popular attention has focused on musicals from Broadway, Berkely focused more on making musicals that could be shown in the silver screen. He was noted for his amazing overhead shots which show many dancers acting in a uniform and symmetrical manner to create unusual kaleidoscope like patterns. 

                                       The Hollywood Musical as a Kaleidoscope

In case you are unclear what a Kaleidoscope pattern is, the following video demonstrates how Kaleidoscopes create unusual artistic patterns. After watching the following video scroll down and look at two of Berkeley’s famous silver screen musical that uses overhead shots of dancers to create similar kaleidoscope like patterns. In the Great Depression, this unique form of the American musical became so popular that Busby Berkely became a very celebrated director of American musicals.

                                      Unique Pictures formed by a Kaleidoscopes

                                    Video of Busby Berkey's Kaleidoscope Musicals

                                      Video of Busby Berkeley Musical Gold Diggers

                                     Maria Carey Combines Two Traditions

If you then review Carey Christmas video, you will quickly see at the end of her video she is imitating Berkeley’s overhead shots of her dancers. Her show is thus a remarkable synthesis of popular soulful music from the 1990s with what David MacDonald described as American unique tradition of creating musicals. In this case Maria Carey has decide to imitate or recreate a very unique and popular form of musical that harks back to the depression years of the 1930s.

                                             Maria Carey famous Christmas song

                                            Maria Carey What I want for Christmas

Besides Maria Carey, a variety of other artists have also developed more soulful versions of Christmas music. Most notably, Kelly Clarkson’s song “Underneath the Tree” talks about how lonely Christmas is without her mate. Whereas Andy Williams in the 1940s describes Christmas as “It’s the Most Wonderful time of the Year, Clarkson laments that Christmas time can be “cold and grey” if you are all alone.  Likewise Leona Lewis’ song “One more sleep,” complains about the difficulties of being separated from her partner one more night.

Finally to cap off the soulful nature of much recent Christmas music here is the popular Wham tune of George Michael’s “Last Christmas” about how he lost his love last holiday season. 

Where the music of the fifties contained no hint of lost love or emotional conflict, by the 1990s the harmony of Christmas seems more fragile. In place of chestnuts roasting on an open fire or Jack Frost nipping at your nose people are more worried about being estranged from their partner.In contrast to the certainty and serenity of a Bing Crosby view of Christmas, Carey and other singers decades are merely hopeful that theirwish will come true on Christmas eve.

                                              Underneath the Tree

I included another version where you can see people enjoying and participating in this performance by an impressive entertainer. Clarkson’s show is a pleasant Christmas experience.

                                      Another Version of Underneath the Tree

                               One More Sleep about being Alone on Christmas

                                               Wham Last Christmas

3. The Fourth Phase. 2000 to the Present. The Rise of Christmas and Hip Hop Fusion Music.  While the words stay personal, the tempo, or beats per minute and dancing to the music seem more frenetic.

Finally the last form of Christmas music that has developed since the start of a new century has been the rise of Hip Hop Fusion Christmas Music. This fusion has occurred because today rap music has become so popular that it sells more songs than either Rock and Roll or Rhythms and Blues.

Before developing these points, we have to ask what is the difference between Hip Hop and Rap music. While Hip Hop is a general term for the emergence of a distinctive form of black culture that arose in poor minority areas in the 1990s, Rap is one of four forms of expression that Hip Hp Culture uses to expresses its view of the world. Its distinct world is the “Hood,” a neighborhood of generally poor African Americans as opposed to a white or black middle class residential areas.

To briefly summarize Hip Hop Culture thus consists of the four following traits.

                                               1. Rap Music

                                               2. Graffiti art on Public Buildings

                                               3. Break Dancing

                                               4. Dreadlock hair styles

Unlike traditional singing, Rap consists of two artists, one a DJ who selects, amplifies and mixes previous recorded music, while a MC speaks very rapidly or raps over the music of the DJs, often in a rhyming fashion.

While we don’t have time to talk about the origins of Rap, when it originated in the 1990s it was generally hostile to mainstream American society and often justified violent actions against the police. It also frequently dismissed women as hoes, promiscuous women, who were to be used to satisfy the desires of men. 

Like Critical Race theory, Rap in particular and Hop Hop in general was hostile to traditional American values such as punishing criminals for their behavior or stressing values like being punctual or hard working, all values they argued were racist. 

In contrast to middle class blacks, rappers also claimed that their lifestyle in the “Hood” was a more authentic form of black life than that espoused by African Americans who sought to achieve upward mobility by conventional means.

                                          How Rap Music is Changing

However with time, in the last decade much of Rap music has lost its edge for three reasons. First with the financial popularity of much Rap music, many Rap artists have become millionaires and thus have lost their legitimacy as voices of the poor and downtrodden. 

But secondly, as mainstream corporations have started to use rap music to sell their products to young men, the music has been coopted by big businesses to serve their commercial interest.  While many people once saw Rap music as music that was highly critical of American society, today many critics argue that its use by business in commercials today has turned it into another form of advertising.

But thirdly, as Rap has gained popularity, a recent development in American music has been the replacement of separate genres of music with fusion music. What does fusion music mean? It essentially means that increasingly artists are combing different forms of music to create an unusual blend of musical styles.

Today because of its commercial success, Rap music has been combined with other genres of music such as heavy metal or R&B or in this case traditional Christmas music. 

In the following two songs Maria Carey and Cher sing Christmas songs in a neo Rap fusion fashion. But each song achieves this goal in a different way. 

                                                  Beats Per Minute

In Maria Carey most recent Christmas song, Rap’s influence is evident in the initial heavy drum beat of the song. As soon as you turn on the video it is easy to recognize the pounding beat of rap music that starts the video The drumming will catch your attention as its upfront and in your face.

To understand why that is the case, recall that in an earlier post when talking about the principles of music, we remarked that rhythm and beat are two very different components of music. While rhythm refers to the time or patterns in which notes are played, beat refers to the tempo of the music. After all, any type of rhythm can thus be played in either a slow or very fast tempo.  

While we have pointed out earlier, that R&B as well as Funk and Brazilian Samba music is noted for its complex rhythms, and even multi rhythms or polyrhythms, Rap music is also distinctive for its incredibly fast pace or rapid beats per minute. 

To illustrate this point musicians talk about the BPM of music which refers to the number beats played per minute. With Rhythm and Blues music, most songs have a BPM of anywhere from 60 to 80 beats per minute while Rap Music often has a BPM of 85 to 115 beats per minute.

Secondly, Rap musicians are noted for their verbal agility, dexterity and endurance. A successful rap musician will quickly spew out nonstop a series of words that he will try to maintain throughout the whole record. In a similar fashion Maria Carey, in her new Christmas song, will speed up the pace of her singing her lyrics similar to a DJ raping on a hip hop song. 

Towards the end of the song there is also an unseen chorus that engages in a rapid recital of the song’s lyrics, enhancing the rap nature of the tune. In this Christmas tune there are no soulful movements where Maria Carey can express her emotional pain about being alone. 

While Maria Carey’s fusion of different musical genres is novel, it is questionable whether her lyrics and musical format are compatible. While her lyrics for her latest songs are fairly tame, about finding love and overcoming loneliness, the rapidity of her delivery undercuts the point of her song. 

Similarly in Chers’ Christmas song, the dancing incorporates the physical nature of break dancing. While the dancing in Maria’s video is well choreographed, in Cher’s video the danced steps towards the end of the video are more kinetic, and even chaotic in nature. There is none of the elegance of a Michael Jackson dancing or the fancy footwork of James Brown.

                                              A Fusion Christmas song

                                            Cher singing about Christmas

                                  Conclusion: 70 years of Christmas Music

Over the last half century, we have seen a remarkable evolution of American Christmas songs. Whereas in the 1940s and early 50s Americans seemed to prefer mellow tunes by crooners singing songs crafted by Tin Pan Alley, by the 1960s Americans preferred that their holidays tunes had a rock and roll beat. Years later the country also seemed to be in a mood to hear soulful songs about individuals finding their true love at Christmas time. And even more recently Americans seem willing to entertain songs that are more frenetic in nature. While Rap music was once a fringe kind of music, it now is even affecting the tempo of our holiday songs.

The changing style of Christmas music reflects in turn the changing nature of American society. Bing Crosby, Frank Sinatra and Andy Williams sang more placid and mellow tunes because in the 1950s America was a more placid and contented society. Today the very fact that soulful sounds about lonely individuals hoping their true love will appear on Christmas day reflect the partial breakdown of personal relations, especially marriage rates in the country.  

                                             Changing Marital Patterns

For example, in contrast to the 1940s, and 50s, the divorce rate is four time higher today than in the post war period. For those of us who attended either Cal or Joaquin Miller in the 1950s, most of us came from stable two parent families. While over 80% of adults were in marital relationships in the 1940s, today that figure had dropped to around 60% as more and more women are choosing not to get married. Marriage has become a more fragile and even transient institutions as divorce is now a common occurrence among most Americans.

Sadly enough, if the problems of being alone are not serious enough, the problems of broken relationships are likely to become even more acute during the holiday season. Around Christmas, time, a period in which people are expected to be happy, individuals are likely to feel more intensely the lack of an intimate relationship.

In the 1960s it made no sense for Christmas songs to sing a soulful tune about finding your ideal lover on Christmas, as most Americans probably believed that ideal lover was either their husband or wife who had been living in their home since they were married. It thus made more sense during the holiday season to celebrate either a family winter wonderland or chestnuts roasting over an open fire. For most Americans Christmas was a wonderful family-oriented time of the year.

As the pace of society picks up, it is to be expected that we would also prefer music with a faster beat. In many discussions of America today, people talk about the acceleration of everything. People seem to grow up faster than ever, the pace of work seems to quicken and Americans often seem to have trouble just enjoying everyday life in an accelerated world. 

As we have mentioned before America in 1960s was more cordial and trusting country in the 1960s compared today’s less trustful and adversarial America. The world has also become a more frenetic and unpredictable place to live. That change in American life is partially reflected in the kind of music that is being produced today to celebrate Christmas. 

But fortunately, we are still free to shape our own lives. As individuals we can thus either choose the harmonious serene tunes of the 50s, the rhythmic songs of the rock and roll era, the soulful music of the last decade or the more frenzied tunes of the rap age.

Regardless of which type of Christmas music you choose to listen, hopefully it will bring some cheer to you and your family during this holiday season. Merry Christmas to all of the McClatchy Class of 1963.

 

 

 

 

 

 


12/09/24 10:00 AM #511    

 

Bill Kelso

 

                                                 Melisma

If you are curious about music, you may be interested in learning about Melisma, a very unique singing style that is evident in Maria Carey's last Christmas song. When you listen to a singer like Maria Carey who ranges from pop, R&B to soul music as well as other more exclusively soul singers like Whitney Houston or even Aretha Franklin, you often find them engaged in a type of verbal flourishing called Melisma. This is a form of singing that not many singers can do. When you hear it you have to be impressed by the range and talent of the singer singing in this manner.

                                      Varying the Pitch by the Lyrics of a Song

But to understand Melisma perhaps we need some background. Before we can understand Melisma, we need to recall that some singers will vary the pitch of their voice depending on the nature of a song’s lyrics. If the song is an emotive love song, when the song’s lyrics say “I love you,” a male tenor may sing the above words at a higher pitch or falsetto to stir an emotional reaction in his audience.  

While we generally classify singers as having a certain singing style such as a tenor or baritone, versatile singers may vary their pitch in the course of a song to heighten the impact of their singing. But to do this a singer has to have tremendous range which means that can sing a song at different pitches.

                Varying the Pitch while singing just one syllable in the lyrics of a song

But if varying the pitch of a song according to the lyrics of a song is impressive, what is even more demanding and hard to do is to sing just one syllable in three, or even four different pitches. If a singer can do this then we are talking about Melisma. 

Before Maria Carey’s latest Christmas song, the most famous example of Melisma occurred in Whitney’s Houston’s movie the Body Guard. If you watch the following clip, wait until the end when Keven Costner comes to save her and Whitney Houston sings the different syllables in “I will always love you,” at different pitches.

                                         Whitney Houston: I will Always Love You

If you now go back and listen to the end of Maria Careys new Christmas song, she also uses Melisma to enhance the emotional impact of her song. 

Again it is important to note that very few singers have the verbal range and endurance to engage in this type of singing. Besides Whitney Houston and Maria Carey, and Aretha Franklin perhaps only Celine Dion and perhaps Steve Wonder and Luther Vandross enjoy this technique.

                                                     Black Gospel Music

Interesting enough Melisma was often found in Black Gospel music as singers went all out to express their faith and love in Jesus Christ. When Ray Charles and Aretha Franklin at Atlantic  records decide to merge Rhythm and Blues with Black Gospel Music Melisma found its way into American Soul Music.

That influence is evident in Whitney Houston's powerful singing in the movie "The Bodyguard." But it is a rare technique in popular music as very few singers can successfully pull it off.

As a final note it should be noted that Melisma is commonly found in Middle East music. In the Jewish religion melisma is used in the chanting of the Torah. 

 

 


02/11/25 05:05 AM #512    

 

Bill Kelso

                                         A Final Retrospect                 

                    A Brief Look at Why Where and How We Exist

As people age, they often change and develop new interests or hobbies to pursue. Many people even develop bucket lists of things they want to accomplish before they pass on.

The issue may be more important today because most people in our high school will soon be living out the last chapters of their lives. For a few lucky ones, they may be in such good health that they will live another 10 to 15 years and perhaps die in their middle to late 90s. But probably for the majority of us, in the next four or five years we will no longer be around.

If that is the case, I was thinking there might be some classmates who want to know more about our place in the universe as well as have some idea where we come from. To realize that goal I decide to post some recent findings in astronomy, biology and paleontology. However, I realize this is an issue that many people may find tedious or boring. And this subsequent post is probably not for everyone. But I was thinking at least a few people might want to know amore about our past, in particular about our home which includes the cosmos and out planet, as well as the origins of our human race before we finally pass away. In some ways it may be easier to accept the end of your life if you have some idea of where when and even why we were created.

                                   The Major Discoveries of the last 70 Years

The reason I am bringing this up, is that one of the most remarkable developments in the 60 years since we graduated from high school is the ability of the natural and social sciences to finally understand both the nature of our universe and planet as well as why we humans even exist. 

Prior to the years we graduated from high school, very few scientists could answer questions about our universe or more basic questions about when life first arose on earth. But thanks to the work of many creative people in a variety of fields such as cosmology, biology or paleontology, an average citizen can for the first time have a pretty good idea about 1) our home the cosmos and planet as well as 2) the origins of our species. And even more importantly we can even make educated guesses about what the future may hold.

Because our generation has gained so much information about how our universe works and the nature of our lives, it seems like a tremendously wasted opportunity to pass away without exploring these new discoveries. The world surrounding us is a fascinating place and it can be an enjoyable experience to finally learn how our planet and and the lives of our ancestors developed over the years.  

To achieve that goal, I have listed a brief and hopefully easy summary of the nature of our universe as well as the history of our human origins.

                                             The Contingent Nature of Life

If you decide to read the following summary, I should warn you that much of the above research lacks a religious focus. On the contrary many students of our world believe that the creation of the universe, as well as life on earth may be contingent events which means events governed by pure chance. In fact, as you will soon find out, many physicists biologists and paleontologists, think that our universe and human existence is a lucky one-off experience. That is eventually our solar system and universe will collapse along with all the forms of life we see around us. But while they believe our universe will die out, most astronomers argue that other universes may continue to exist with perhaps very different forms of life. 

In addition, as mentioned above, many paleontologists see the very existence of human life as a result of very lucky and contingent events that could have turned out very differently. Our very presence on earth today may be explain by a serious of unusual events in astronomy and geology that accidently lead to the creation of our unique species.

But if the origins of humans is a unique event, our current lives are also remarkable.  Today our life style as well as our longevity are dramatically very different from how most humans experienced their lives. For most of human history people were incredibly poor, had physically demanding and exhausting lifestyles and lived very brief lives. 

In contrast, we Americans in the 21st  century have enjoyed a period of health and prosperity that over 99% of the people who preceded us never enjoyed. And if we go one step further and look at the per capita wealth of Americans and compare that with people in Southeast Asia, Africa, the Middle East or Latin America, we find that we enjoy an unusual rich and comfortable life.

To explain why that is the case, I made an outline of the topics I want to focus on over the next several posts. Before our time is up, it may be enjoyable as well as fun to finally know how, why, and where we came from.

                               Table of Contents

                                             I        

                                           Changing Views of Our Universe

                 From the Idea of Gradualism to the Idea of Punctuated Equilibrium 

                                              II

    Understanding Our Home: Our Universe and  Galaxy

                                                                   III    

                                                               Our Home        

                                     Our Solar System, and How it Functions

                                                                    IV

                                                            Our Planet

                                                                    V

                             The Growth of Life in our Corner of the Universe

                                                                    VI

                                          The Growth of Human Life on Earth

                                                                    VII

                                       How Humans Acquired the Ability to Speak

                                                                    VIII

                                               The Development of Civilization

                                                                      IX

                                                        A Final Retrospect

                                           How to Make Sense of our Universe 

         

 

 

 

 


02/12/25 01:35 PM #513    

 

Bill Kelso

             I

                                Changing Views of our Universe

In the last 70 years our understanding of our world as well as the origins of human beings has been turned upside down. From the start of the 20th century through the 1970s scientists generally thought our universe and planet were basically stable entities that had always existed. While Darwin had invented the idea of evolution in the 19th century to explain the development of animal and plant life, astronomers and geologists rejected the idea that evolution applied to their fields.

But by the end of the 20th century all of the above ideas came under criticism and were eventually rejected. As we will hopefully see in the many posts that follow, the natural and social sciences soon crafted a very different picture of how the universe worked.

To appreciate this change in the outlook of the scientific community, I want to contrast the attitude of the three disciplines of astronomy, geology and biology in the years prior to the 1960s and their very different outlook in the post 1960s period. 

As a final note, I also want to suggest that our generation has been extremely fortunate in living at a time when our solar system, planet and climate have enjoyed unusual stable and benign times. In light of the rather challenging periods that have plagued the earth in the past, future populations will undoubtedly face difficulties that we have been able to avoid. Hopefully this and the following posts will clarify what those challenges are. 

                                                                 (1)

                                   How the early 20th Century Viewed Our World

a.Our View of The Heavens

Prior to the 1960s, most astronomers believed that the world was governed by universal principles that seemed to apply to all entities in the universe. Certainty and universal laws rather than evolution and its belief in a constantly changing world governed the discipline of physics and its notion of the universe. While life on earth may have evolved over time, many astronomers believed the physical makeup of the universe has existed in its present form since eternity. 

b.Our View of Geology and the World’s Continents

The situation in geology was slightly different as geologists recognized that the weather could erode continents and volcanoes could remake the environment. But despite these changes, geologists believed that the makeup of continents had always existed and were fairly stable entities. Geologists were often unsure why mountains existed, but they thought there was no reason to assume that our continents changed and evolved the way Darwin explained evolution.

c.Our View of Biology

Finally, although at first Darwin seemed to suggest that the world of biology operated on different principles than physics or geology, he hedged his bets.  When Darwin developed his notion of evolution in the 19th century, he insisted that it operated in a gradual and incremental way. Because plants and animals evolved in a slow and gradual fashion, the world of biology was a fairly stable world in which natural selection developed an efficient and biologically functional world. While theoretically biology seemed different from other scientific disciplines in its embrace of change, in practice its notion of change was limited and only incrementally different from the outlook advocated by geology and physics. For all the sciences there was thus a belief that our world was basically a stable universe that saw only minimal and gradual changes over the years.

                                                                   (2)

                     How the Late 20th Century Transformed our View of the  World

By the 1990s all of the above ideas were under attack and eventually rejected. Biologists led the way in revising our understanding how our world functioned.

a.Changing Views of Biology

While Darwin insisted that biological change was slow and gradual, other biologists in the early 1970s argued that the world of plants and animals operated according to the principles they called “Punctuated Equilibrium”. In punctuated equilibrium rapid periods of evolution occurred in which totally new species of organisms quickly appeared. Once dramatic periods of creation occurred, the planet often entered a period of stasis or stability in which little or no change occurred. But periods of stability did not last forever and were often eventually followed by periods of mass extinction.

While advocates of Darwinism had focuses on micro biology and studied how mutations in our geneses were either accepted or rejected by natural selection, the advocates of punctuated equilibrium also took a larger macro view of life and showed how astronomical or geological factors also shaped evolution. For instance, they pointed out that the meteorite from outer space that wiped out the dinosaurs 66 million years ago and the geological development of a rift valley in Africa five million years ago may have created human beings.  To understand biology, we had to understand how segments of our world interacted with one another and played a decisive role in creating our species of Homo Sapiens.

b.Changing Views of Astronomer and Physics

While the term punctuated equilibrium was developed in biology it also seemed to describe what was happening in the world of astronomy. When astronomers looked at the universe, they initially believed that it has always existed. By the late1960s scientists found evidence that our universe was the creation of a big bang or major explosion that propelled a very small piece of space to develop into our large and possibly infinite sized universe. Evidentially space, like biology, was not immune from the process of evolutionary change.

As was the case with biology the universe had been created overnight only then to settle into a period of statis in which the university slowly grew over time. Because physicists believed that the laws of physic were immutable, they eventually felt that the force of gravity would eventually slow down the universe and force it to collapse upon itself. 

However, in 1998 astronomers were shocked to learn that the universe was accelerating rather than slowing down. To explain this phenomenon astronomers had to accept the fact that perhaps the force of gravity had weakened over time. But even more surprisingly they now had to accept that perhaps a previously unknown force called “Dark Energy” had supplanted gravity and was now controlling the fate of our universe.

In any case the universe was not stable at all. It had an origins, was today rapidly expanding and appeared to have a finite life. Life in our universe appeared to be a one-time experiment that would eventually die out. Rather than our universe being eternal, it seemed to be a transient, albeit a long term transient, cosmos that for a short time at least contained a solar system which supported plant and animal life forms  But as remarkable as that achievement was, it was an achievement that was fleeting in nature and would eventually die off.

c.Changing Views of Geology

As was the case in astronomy, the discipline of geology also underwent a dramatic change in the late 1960s that was comparable to the Punctuated Equilibrium debate in biology. For most of the 20th century most geologists had argued that our five continents were permanent features of our planet. At the same time geology was struggling to develop as a discipline as it had no real explanation as to why the planet had so many mountain chains in only particular regions of the continents. 

In the late 1960s the above view of the permanent nature of our continents was dramatically overthrown. In what today is known as the plate tectonic revolution, geology came to realize that our planet’s continents exist on various plates that are constantly moving about because of the heat generated by our earth’s molten interior. At times that movement results in the various separate continents crashing into one another, creating a super continent. As geologist did more and more research, they even realized that there may have been as many as 4 super continents in our planet’s history. But just as the molten heat of our planet may at times force continents to merge, the same heat may also rip a continent apart.

This theory of plate tectonics also finally gave geology an explanation as to why we have mountains in various parts of the world. It is only when land masses either collide with one another or break apart that this geological activity creates mountains.

When continents are in contact, we are in a period of punctuated equilibrium, but until they interact or break apart, the world appears to be in stasis, experiencing little or no change.

                                                                   (3)

                                           A New Way to View the World

If the above changes in the disciplines of biology, astronomy and geology made us view the world differently, they also made us rethink how life had evolved on earth. As the above disciplines gained more information over the past 70 years, scientists realized that the development of human beings was a result of often complicated and unanticipated interactions between the universe, geology and human biology. As we shall see when we look at the various stages in the development of the earth, biologists now believe humans would never have been created if it were not for the interaction of the moon on the oceans, the effect of meteorites on the dinosaurs or the impact of plate tectonics on the rain forest in east Africa. Hopefully as the following posts will explain, our changing solar system, our earth’s geology and our  own human development are all related and connected events.

                   (4)

                                                An Uncertain Future

However the biggest consequence of humanity’s new found knowledge about our world is the uncertainty it raises about the future of mankind. If the universe is governed by the principles of punctuated equilibrium, we have to realize that stable periods in the life of our planet are not likely to last forever.

In many ways the generation of humans who have lived on the earth since the last ice age, have lived in a relatively stable and quiescent period of planetary history. But those periods are not likely to last forever. After all we know our planet has endured numerous ice age ages as well as prolong periods of intense heat. We also know that in the last 540 million years there have been 15 periods of mass extinction, five of which have been major extinctions in which 75% to 95% of all species on earth died. 

If the above events have happened in the past they are likely to also exist in the future. While we and our recent ancestors have enjoyable a reasonable and comfortable life, we cannot be sure that the same future will benefit later generations. 

If much of this material seems overwhelming, I have listed below a short outline of how our understanding of our universe has dramatically changed since we graduate from McClatchy.

 

         a.Pre 1960s

Astronomy                          A Stable Universe                       

                                             The Unchanging laws of Physics

 

Geology                               The Unchanging Continents

                                             Minor Geological Change

 

Biology                                Evolutional Change

                                             Darwin’s Incremental View of Change

 

                                                       b. Post 1960s

Astronomy                            Punctuate Equilibrium

                                              Dramatic Changes to the 

                                              Universe and the Laws or Physics

                                             The Big Bang & the Big Rip

 

Geology                                Punctuated Equilibrium

                                              The Changing Continents

                                              Plate Tectonics & Hot Spots

                                              Our Climate was Variable & had  

                                              experienced 5 major ice ages as

                                               well as periods of extreme heat.

                                    

Biology                                Punctuated Equilibrium

                                             Dramatic Change in the Rapid

                  Evolution of Animals & Plants           

                 Fifteen Periods of Mass Extinction

                                        (5)

                            A Concluding Note

If the history of our universe and life on the planet has been at times chaotic and even fleeting at times, we should be thankful that at least we lived on the earth when conditions was fairly stable. While that period of stasis led many people to mistakenly believe that the history of our planet had always been stable and similar to the life we experienced, we now know that is not the case. 

But the uniqueness of our experience should make us thankful that we lived in such benign times. As we come to the end of our lives over the next several years, we should be glad that we were able to live in what is possible a unique and stable period in our planet. Future generation in the centuries ahead may face difficulties that we never had to confront. In this sense our class of 1963 has enjoyed a good run the last 80 years, and for that we should be grateful.

 

 

 

 

 


02/13/25 02:56 PM #514    

 

Bill Kelso

                                                                                           

                                                            (1)

                                           The Origins of the Universe

In the last 100 years our understanding of our universe and planet has been completely upended. When we were in jr. high and high school astronomers generally though our universe had always existed.  But in the late 1960s all of that changed. Due to a variety of new observations, scientists finally realized that our universe was born in what physicists today called the Big Bang, some 14.8 billion years ago. 

The world we lived in had not always existed. It had a beginning and a fairly long and complex history. Initially our universe was the size of a of a grapefruit but since its origins it has expanded to such a length that we are not sure how large it presently is. 

                                                                  (2)

                                                 The Shape of the Universe

While some question the size of our universe other astronomers debate what is the overall shape of the universe. Some think the universe is flat and extends into infinity while others think the universe has positive curvature like a sphere and is finite in shape. Because of its curvature if a space ship tried to travel to the end of the universe, it would eventually end up where it began its journey.

                                                                 (3) 

                           The Strange Accelerated Expansion of our Universe

Once astronomers realized that the universe was born in a big bang and was constantly growing, they believed that our universe would eventually slow down and perhaps collapse. After all ever since Issac Newton had discovered the idea of gravity 300 years ago, scientists believed that the expansion of the universe would eventually stop and gravity would pull and drag the universe back to its original size. Based on their earthly observation, they assumed the universe had expanded because of some explosion that caused the big bang, that would eventually peter out. Just as an explosion lifts a space missile into the atmosphere, the pull of gravity eventually causes it to fall to earth.

But in 1998 that long held view of scientists came completely undone. In that year a variety of astronomers from different universities in America discovered that not only was the universe still expanding but that it was expanding at an accelerating rate. During its history, the universe was speeding up rather than slowing down.

This observation initially dumbfounded scientists. It suggested that our theory of gravity was perhaps wrong. The more scientists studied the problem it dawned on them that perhaps the idea of gravity was not wrong at all. Instead, they realized that perhaps there was another force operating in the universe that nobody had ever realized before, a form of energy they started to call “Dark Energy” that had come to overpower the influence of gravity. While gravity may at one time have shaped our universe in its earliest years, it now appeared that another force had displaced it as the major influence defining outer space. 

                                                       Dark Energy

Dark Energy is like a negative form of gravity. Instead of attracting galaxies and planets like gravity, dark energy seems to repeal or repulse objects from one another. While gravity works on earth and in many regions of space, dark energy was apparently overwhelming and displacing gravity in the larger cosmos, dispersing rather than consolidating the very structure of the universe.

                                                                  (4)

                                                How the Universe will Die

The observation that a new force that humans had never suspected existed before has immense consequences for the future of the universe. This new force suggested that the fate of the universe was going to be very different from the previous belief that the cosmos would always exist. In light of the new discoveries of both the Big Bang and the accelerated expansion of the universe, astronomers now realized that our universe probably had a finite life and was not going to be around forever.  

Currently most astronomers think the universe is in middle age and will probably die out in maybe another 14 billion years. It will probably die in one of two ways. Because as we just mentioned the expansion of the universe is accelerating, at one point the other galaxies will be so far away that the night sky will become totally dark and our universe will die a silent and cold death. The other option is that the expansion of the universe continues to accelerate to the point where it tears apart every sun and planet in the universe. These two ultimate fates of our universe are known as the Big Chill or the Big Rip. Fortunately because we will no longer be around when the universe dies we will not have to experience either option.

                                                                 (5)

                                       Why Human Space Travel will be Limited

Even though the universe will one day die, many astronomers suggest that we should try to enjoy our universe while we can. Ever since the days of the TV program Star Trek or the Movie Star Wars, humans have hoped that one day people would be able to extensively engage in space travel throughout our universe. Unfortunately, that option may not be physically possibly.  The expansion of the unvierse may limit our future space plans.

Years ago when Einstein was alive he discovered that nothing inside the universe can go faster than the speed of light. That speed limit applies to objects like hurricanes, sound waves, light waves, planets, galaxies, even the influence of gravity as well as human made objects such as a spaceship. In fact, any spaceship humans made would probably travel considerable slower than the speed of light, which is also true of most of the objects listed above.

Why does the above fact limit our ability to engage in widespread space travel? As mentioned above, astronomers recently discovered that the expansion of the universe is accelerating. When they did the calculations and compared the rate at which the universe or what astronomers call space time is expanding with the speed of light, they realized that the cosmos is accelerating at a faster rate than light rays. Evidently Einstein’s finding that nothing can go faster than the speed of light merely applies to objects within the universe such as planets or spaceships itself. While objects in space have finite speeds, the very structure of the universe itself seems to lack any such speed limits.

The implications of the above discovery are significant. They basically mean that as the structure of the universe expands, it forces other galaxies and planets to race further away at a speed that exceeds our ability to chase after them. Before long so much of the universe will be so distant, that it would be impossible for humans, who cannot exceed the speed of light, to even contemplate catching up with them.

While we humans may have fond memories of TV programs like Star Tract in which space travel seemed like an everyday event in which mankind would explore the whole universe, we have to realize that humans will probably at best be able to explore primarily planets within our own galaxy.

                                                                (6)

                                              The Fabric of the Universe

If the above observations changed our view about the origins of our home, and the eventual fate of the cosmos, new satellite pictures of the stars also altered our understanding about the internal makeup of the universe itself. 

If we just stare at the sky at night, every part of the universe seems to contain numerous galaxies and stars. However, when astronomers began to take pictures of the various regions of the universe, they found that the nature of the cosmos resembled more a piece of Swiss cheese rather than a dense occupied universe as it seemed to be full of numerous holes.

Today we realize that within our universe, there are vast voids or empty spaces that exist that are overlaid by large structures astronomers call filaments which are essentially thread like structures that are linked together. In our universe astronomers now realize that a web like pattern seems to cover the internal makeup of the cosmos.  If you scroll down and hit the following web site, you will see that the voids are the empty bubbles within the cosmos while filament are the connecting threads.

                                    A Picture of the Voids and Filament of Outer Space

Because of gravity, the filaments attract the different galaxies in a web like pattern while the voids separate the galaxies from one another. The voids seem to contain this mysterious force called dark energy which is essentially pulling the various galaxies further and further away from one another.

                                                                 (7)

                               The Two Structures that make up our Cosmos

As the two previous comments suggest, our universe is made up of two very different structures that are comprised of different components and are governed by different laws of physics. On the one hand we have the very structure of space or cosmos which Einstein called spacetime. As we shall explain in more detail later, it will consist of a unified, continuous and dense but malleable material that many people liken to a rubber sheet. Unlike objects within space, it is subject to a strange new force called dark energy that has caused space time to expand at an accelerated rate. And when space time moves, it is not subject to any type of speed limit.

In contrast objects and space within the cosmos or within space time, differ in three way from the very structure of space. 

First, within the cosmos objects like galaxies and planets, occupy a Swiss cheese type of fabric or intergalactic material which is full of voids and filaments that is very different from the dense and continuous material of space time.  

Secondly, within space time, gravity, seems to determine how the numerous galaxies interact with one another while the external structure of  the universe or cosmos is driven by the power of dark energy.

Finally objects within our universe cannot exceed the speed of light while space time seems to have no limits on its power of acceleration.  The makeup of space itself and the nature of the objects within space time have both very different kinds of structure and obey very different laws of nature.

                                                             (8)

                         As our Universe Dies, other Multiverses will live on

Finally the last development of what has been a remarkable change in our view of the universe, is the belief of many astronomers that there may be many other universes besides our own. When our universe dies out with all of its life forms, alternative versions of life may continue to exist in other universes.

The above observation raises an interesting point. One of the most unanswered questions in philosophy is why is there some thing rather than nothing in the world. While the idea of multi verses does not directly answer this question, it suggests that universes and possible life forms have existed for ever. 

Even though individual universes may arise and die, temporary or transient universes may always have existed. If that is the case, the creation of our universe and our form of life may not be anything special or unique. We may be merely one more example of a transient universe that is merely a temporary part of a larger network of universes that are constantly being born and dying. As our universe dies other universe will experience another big bang and later a big rip or a big chill in a never-ending process of creation and destruction. 

Life in our particular universe may be a one off experience that lacks any sense of permanence. If there will be other universes that will replace ours, their life forms may be nothing like our own and may following different principles of physics.

                                                                 (9)

                                                  What Does it All Mean

The recent discoveries about our universe raise more questions than they do answers. If we go back to Galileo’s times, the Catholic Church once thought that the universe revolved around our planet and that we were uniquely special. Unfortunately, we seem to be merely one of many universes which may not be that unusual or notable. When we finished all of these posts, we will try to make some sense out of all these new discoveries in astronomy.

 

 

                                             

 

 

 

 

 

 


02/14/25 01:45 PM #515    

 

Bill Kelso

                             Our Milky Way Galaxy, One of Many Galaxies

                                                             (1)

                                          The Discovery of Galaxies

Galaxies play a prominent role in our universe as they represent a large collection of stars. While periodically a lone star may be found wandering in the universe, the overwhelming majority of stars are in large groups called galaxies. Surprisingly it was not until 1924, roughly a 100 years ago, that most astronomers realized the bright lights they saw in the night sky were galaxies rather than individual stars. Since astronomers estimate that an average galaxy contains over a 100 million stars, initially astronomers were severely undercounting the number of stars in our universe.

As we shall see at the end of this post, our location within our galaxy has played a major role in ensuring the survival of our planet and the eventual evolution of mankind.

                                                                 (2)

                                               Why do Galaxies Exist

The reason why galaxies exist is because of gravitation, a force we shall discuss in more detail in another post. As galaxies get bigger, their gravitational pull increases, and they attract even more stars and even smaller galaxies.

                                                                (3)

                                                The Birth of our Galaxy

Our galaxy which is called the Milky Way originated 800 million years after the birth of the universe.  Astronomers consider it to be a medium size galaxy. Because it is merely one of what cosmologists believe are 2 trillion galaxies in the universe, there is nothing unique about our home in the Milky Way.

                                                                (4)

                                                      Types of Galaxies

Once astronomers realized the universe was full of galaxies, they quickly began to identity different types of galaxies.  Presently the three main types are Spiral Galaxies, Elliptical Galaxies and Irregular Galaxies. Some Spiral Galaxies are also called Barred Spiral Galaxies. A Barred Spiral galaxy has its spiral arms attached to a straight bar in the middle of the galaxy. Roughly 2/3 of all spiral galaxies are of the barred Spiral Variety. 

If you scroll down and look at the next post you will also see that our galaxy has the shape of a barred spiral galaxy. 

                                              The Spiral Nature of our Galaxy

                                                              (5)

                                      Why do Galaxies have a Spiral Shape

The obvious question is why do so many galaxies, including our own galaxy, have a spiral shape. The answer is that because of something called differential rotation. That concept refers to the fact that stars near the center of the galaxy rotate faster than those further out creating a wave like patter of denser regions called spiral arms.

                                                              (6)

                                   Why is our Galaxy called the Milky Way

Besides our spiral shape our galaxy is also known for its apparent unusual name, the Milky Way. If you look into the night sky our galaxy looks like a thick white line, hence its nickname the Milky Way. If you are interested in seeing our galaxy, the following post will help you identify our white band in the sky.

                                                  Picture of our Galaxy

That observation raises the interesting question why it looks all white. Because galaxies reflect the ability of gravity to assemble large number of stars in one place, the brightness of so many stars close together create the appearance of a white band of light in the night’s sky. 

Surrounding that band are what at first appears to be numerous other single spots of light from distant stars. Because of our distance from these light sources, what seems to be yet a single star is in reality yet another galaxy.  But because they are so far away, they appear to be light from a single star.  

However, if our solar system were closer to what at first appears to be single stars, we would quickly realize that they too are white bands containing millions of stars. In this sense all the galaxies in the universe could be called Milky Way galaxies.  

                                                                    (7)

                                                Changing Views of Galaxies

As was the case with the universe, our understanding of galaxies has changed significantly over the last 70 years. Over recent decades astronomers have learned two new ideas about galaxies that nobody knew prior to the 70s. and 80s.

                                                        Black Holes

The first idea was the discovey by the Hubble Telescope that at the center of most galaxies are massive black holes. What is a black hole. When a large star exists there is always a tension between gravity which wants to collapse the star and the star’s internal nuclear reactions which seeks to expand the size of the sun as it  burns through its fuel. When the star eventually runs out of fuel, gravity wins the battle and collapses the star into a large black hole. If the star is large, the gravitational pull of the star is so immense that not even light can escape from the collapsed star, hence the name black hole.

Because of the significant size of the black hole, it is now believed that it is the catalyst for the origins of so many galaxies. As the black hole’s immense gravity initially pulls in more stars, the galaxy gets bigger which even furthers its gravitational pull.  

As the size of a galaxy get larger it not only attracts more stars, but it also begins to attract smaller or similar sized galaxies. That is presently what is happening with our Milky Way. Nearby our galaxy is the Andromeda galaxy which is roughly the size of the Milky Way. The two galaxies are attracting each other and sometime in the near future the two bodies will merge to create a gigantic sized galaxy.

                                                            Dark Matter

The second major development in our understanding is the idea of dark matter. Just as astronomers realized that besides gravity there is another force, dark energy, that shapes the universe, they also realized that galaxies are made up of a special type of matter that we can not see, which they have come to call dark matter. Evidently around each galaxy there is a kind of halo of dark matter that encircles each and every galaxy. Unfortunately we humans cannot see this matter or even tell what substances make up this matter. 

                                                                    (8)

             The Key Point about our Galaxy that partly Explains why we are Alive Today.

While studying galaxies may be interesting in and of itself, we should also realize that our location within our galaxy has played a major role in guarantying the existence of our planet. We need to realize that all the inhabitants of life on earth have been fortuitous in where our Solar System is located.

                         The Fortuitous Location of our Solar System in the Milky Way

Our planet has been lucky in that our Solar System was created between the three major arms that make up our Milky Way. If you look at the following post you will see that our location is on a very minor arm that is called the Orion Spur that lies between the two largest spiral arms of the Milky Way. 

That is fortunate because in the three largest arms of the galaxy there are many millions of stars which are constantly being born or dying. When a star dies there is often a massive explosion called a supernova which sends out killer cosmic waves destroying everything in its path. Because our planet is in a fairly remote part of the galaxy on a minor spur where there is little solar activity, we have not had to face the danger that a supernova in a nearby star would destroy our planet.

                                              The Location of our  Solar System

                                                                      (9)             

                                                           A Summing Up

Over the past 100 years we have come to realize that the universe is more complex than we thought. What at one time astronomers considered to be a single star now turns out to be a galaxy made up of millions of stars. At the same time, we now know that these galaxies have a black hole at their center which may have precipitated their origins in the first place. Similarly we presently realize that besides the visible matter we can see with our naked eyes, our galaxies are made up of dark matter that we neither really understand nor can visualize.  

But perhaps in terms of our very existence, our solar system happens to be located in a relative safe and benign region of the galaxy. If our planet and sun had been born in one of the major arms of the galaxy, our solar system might have been destroyed before human beings ever had a chance to evolve on the savanna plains of eastern Africa. As is so often the case in our universe, chance events have played a major role in shaping our existence. 

 

 

 

 

 

 

 

 

 


02/15/25 01:48 PM #516    

 

Joeann Schoenman (Matthew)

 


02/15/25 01:49 PM #517    

 

Bill Kelso

                                                           III

                                   Our Solar System, Planet and Moon

Of all the elements that make up our home in the universe, the Solar System has been that part of the Cosmos that people have studied the most. For thousands of years mankind thought the Solar System was the universe. Despite the fact that humans have always occupied a very small section of a medium size galaxy in an infinitely large universe, our ancestors thought our sun, the moon and the various planets constituted the heavens or the universe at large.

                                                             (1)

                                          The Makeup of the Solar System

Our understanding of our Solar System has gone through several distinct phases in which astronomers asked four distinct questions. In the first phase astronomers asked how many planets actually existed in our Solar System. While after several centuries they had discovered 5 planets it was not until the late 19th century that the sky watchers discovered all 8 planets.

                                                               (2)

                                          When was our Solar System Created?

If we turn to the second question which asks when our Solar System was created, it appears that it is of recent origins. Our current solar system developed only 4.7 billion years ago or roughly 4 billion years after the appearance of the Milky Way and roughly 10 billion years after the creation of our universe.  As we will mention later, the Solar System was originally just a dust cloud that resulted from the collapse or an earlier star. Perhaps it was only when another exploding supernova sent out shock waves that condensed this large gas cloud that our galaxy created both our planet and present solar system. 

While individuals in Europe and the west have always highly valued our Solar System and even believed that it and its planets were special, we have to realize that our sun and planets are merely one of over 100 billion stars and solar systems in our galaxy. 

                                                                  (3)

                                                 Is our Solar System Unique?

In the third question which preoccupies many astronomers today, we want to know if our solar system is unique in any way or similar to the billions of other solar systems in the universe.

a.The Planets

Currently we have four rocky interior planets, and two large exterior gas giants such as Jupiter as well as two large ice giants like Neptune in the outer part of the solar system. As astronomers discover more information about other solar systems, they are finding that the makeup of our solar system seems to be very different from other systems in our galaxy. 

While our gas giants are in the outer reaches of our Solar System, most other solar systems have large gas giants orbiting very close to their stars.  Whereas we have distant gas and even very cool ice giants like Jupiter in the far reaches of our Solar System, other systems have Hot Jupiters with incredibly high temperatures very near their sun. These substantial differences are suggesting that our solar system has a very different makeup than its counterparts in the rest of the galaxy.

b. The Sun

The uniqueness of our Solar System even applies to our sun. Our sun is significantly larger than most of the other stars in our galaxy. While our star is considered a medium size star, 70% of the other stars in our galaxy are much smaller suns called red dwarfs. They generally are only 10% to 50% the size of our much larger sun and appear red rather than the yellow color of our star. Why is this difference meaningful? Because our sun is bigger than most other stars in the universe it is a much more reliable source of energy to power our earth which has enabled it to build a complex web of animal and plant life. 

Since other solar systems have dimmer stars they are less likely to provide the energy necessary for their planets to create and sustain significant life forms. This difference in our sun, may explain why so far we have not found any form of complex life on any other solar system.

This issue is a hot topic in astronomy today because many sky watchers are asking if there are any other planets in which humans could move to in case our Solar System ceases to work properly. So far the efforts to discover a possible new solar system and earth have failed to find any possible new home in our universe for possible future generations. 

                                                                   (4)

                                          The Operations of our Solar System

Finally a fourth question about our Solar System asks how it operates.  Historically this topic has been the most contention issue in the early study of our solar system. While at first astronomers did not recognize it, they eventually realized after much heated debate, that our Solar System is characterize by three forms of motion. 

For example, as everyone soon learns in school the earth first revolves around the sun while secondly it also rotates on its axis. As obviously the case, when the earth revolves around the sun it creates a year and when it rotates on its axis, it creates the 24 hours of a day, with 12 hours facing and 12 hours facing away from the sun. A third form of motion also occurs when a moon revolves around the earth roughly every 28 days, creating what today we call months. As a reflection of this close connection, the word month is derived from a German word meaning a moon revolving around earth.

While today the above points seem obvious, most humans on earth only came to believe them several hundred years ago.  For the longest time humans thought the earth was stationery and the sun and the stars revolved around the earth. It was not until telescopes were invented in the 17th century that Galileo could observe that the earth rotates around the sun and in the process constitutes a year. Once astronomers realized that the earth revolves around the sun, they also quickly concluded that the earth must also be rotating on its axis which creates what today we call our day and night. 

Presently we know that the earth is traveling at a speed of 67,000 miles per hour around the sun and simultaneous it is rotating on its axis at a speed of 1000 miles per hour. However, for humans who live on earth, they have no sensation of the rapid speed at which our earth is moving.  This is because the gravitational pull of the sun overrides any sensation we might feel because of the planet’s rapid movement.

As a result, when individuals on earth look every day at the sky they see that the sun appears to travel from the east to the west. But in reality, because the earth is spinning on its axis from west to east we fail to realize that it is the movement of our own planet that is responsible for what we falsely perceive to be the changing location of the sun.

Because these ideas were so revolutionary when they were scientifically verified some 300 years ago by Galileo, the Catholic Church condemned him and held him under house arrest until he eventually passed away.                                                                  

                                                               (5)

                                   Three Major Changes in our Solar System

However what is most notable in studying our planet’s history is that all three of the above motions have often changed and changed dramatically.

1) How the Earth’s Orbit around the Sun is Changing

For instance, when the earth rotates around the sun, at times its orbit is circular in appearance while at other times it become elliptical in shape. The circulation of the planet around the sun often fluctuates and changes the nature of its orbit. As the orbit of the planet fluctuates it may significantly alter the nature of the earth’s climate.

2) How the Length of the Earth’s Day is Changing

Secondly because our planet rotates on its axis, we experience a 24 hour period of alternative hours of sunshine and darkness. But the present tendency of a 24 hour day is a historically recent development. When the earth was first created, the earth spun on its earth at a much faster rate and the average day was only 6 hours long.  From that initial rate the earth’s spinning motion slowed down until the average day became 10 hours, then 18 hours until today’s it is 24 hours. Every century the earth’s rotation is slowing by 1.7 milliseconds. While that does not seem like a lot, it adds up over 4.7 billion years and sometime in the future the day will become even longer.

3) How the Moon ‘s Orbit around the Earth is Changing

The third and final change in our earth’s motion is the length of the average month. When our earth was initially formed our planet was a solo planet without any moon at all. But within possible 100 to 200 million years of its creation, our planet collided with another smaller planet called Theia. The debris left over from that impact eventually coalesced to form the moon.  During this earlier phase the moon was relatively close to the earth. While presently the moon is 240,000 miles away it initially was only 15,000 to 20,000 miles distant from earth. At that distance the moon would have appeared three times larger than it does today and it would have revolved around the earth in a matter of days and at most a week.

Currently the moon is moving away from the earth at a rate of 1.5 inches per year, lengthening the time it takes to revolve around the earth.  As the moon continues to drift it will appear smaller and smaller in the sky until eventually the earth will completely lose sight it. As the orbit of the moon grows, the length of a month will also significantly expand from its current 27 days to perhaps 30 or 35 days.

                                                                (6)

            Why the Solar System is Changing and its Impact on Life on Earth

If in the history of our Solar System, the three motions of the system are changing we need to know why. But even more importantly we need to understand how the above changes have dramatically altered the nature of life on our planet.        

 1) Why the Changing Nature of the Earth’s Orbit Around the Sun

The main reason why the earth rotates around the sun is because of gravity, a concept we will explore at the end of this post. Because the earth also rotates on its axis, the pull of gravity also has to offset this outward pull of the planet. Instead of gravity thus pulling the earth into the sun, it causes the earth to rotate around our sun.

If gravity explains the rotation of the earth around the sun, it also explains why that rotation may be periodically stretched into an oval or elliptical pattern. We have to remember that our solar system is part of the Milky Way galaxy and thus subject to the death of other stars and even the movement of other solar systems. Likewise if some errant meteorite escapes from another solar system, and passes by the earth, it may slightly alter the gravitational pull of the sun and thus modify our planet’s orbit around the sun.

The obvious question is what consequences may follow from the above developments? Because elliptical orbits like an oval are essentially a stretched out circular orbit they may affect how much of the sun’s heat reaches the earth. This point is important because if the elliptical orbits become too extreme, the earth may become much cooler and become covered with ice. That situation has repeatedly happened in the past.  Our planet has twice been a snowball totally covered in ice and five other times it has experienced ice ages, one of which just ended 10,000 years ago.

While today there is a lot of talk about how greenhouse gases cause climate change, we have to realize that solar events like our planet’s orbit may also determine what kind of climate we experience                             

2) Why the Changing Nature of a Day on Earth

If the change in how our earth revolves around the sun is important, the impact of the earth slowing down in its rotation on its axis is even more significant. Before we explain why this second change in the solar system is happening, we need to ask why the earth is spinning on its axis in the first place. 

In our everyday world there are two main types of motion: linear motion which is straight line motion and rotational or angular motion in which an object spins on its axis. 

If an object is hit by a force in its center, it will moves in a straight or linear fashion. If in contrast, an object is hit off center, the object will star to spin or rotate. Most of us are probably very familiar with rotational motions such as 1) Tom Brady throwing a spiral football to his tight end, 2) an ice skater at the Olympics bringing her arms in close to her body and thus spinning, 3) a wheel on a bicycle going round and round. Since our planet is also spinning  it at one time must have been hit by an off center force, but at present astronomers have faileed to clearly identify what that force was.

a. How the Law of Inertia and Friction Affect the length of a Day on Earth

If you just happen to talk to people on earth, they would undoubtedly say that regardless of what factor caused the earth to start spinning, any rotating object will eventually run out of steam and slow down. That was the conventional wisdom in science until the 17th century when Issac Newton, the inventor of gravity, also developed his laws of motion. In effect he turned the world upside down because his first law which is called the law of inertia states that if an object is initially at rest it will stay at rest but if an object is in motion it will always stay in motion. Newton thus suggested that the Earth, like any other planet, will continue to spin at the same rate once it begins to rotate. 

It turns out that Newton was right about all the planets in our solar system except for earth. Of the 8 planets in our solar system, earth is the only planet slowing down and slowing down dramatically. To explain this discrepancy, Newton argued that the only factor that could cancel the law of inertia was the presence of friction. Just as air friction would eventually slow any Tom Brady pass, so friction in our solar system would also slow the rotation of the earth.

Newton argued that friction in our solar system was due to the creation of our moon. Once the earth acquired a moon, the moon began to exert a gravitational pull on the earth. The gravitational tug of the moon pulled the oceans facing it towards the moon and the earth away from the oceans on the opposite side of the earth. As a result of this action the moon was responsible for the high tides experienced every day on the earth. The high tides represented a kind of friction which hampered and slowed down the rotation of the air. 

b. How the the Earth's Tides Affected the length of a day

What are the consequences of the earth slowing down and lengthening the hours of the day? For life forms on earth the consequences are immense. If the earth rotated every six hours, it would have been very difficult for simple life forms like bacteria to evolve into large animals like reptiles, mammals and in particular humans. Similarly, if the planet Theia had never crashed into the earth and created the moon, it is very likely that the major forms of life would never have ever evolved on earth.                                               

3) Why the Changing  Nature of the Moon’s Orbit around the Earth

Finally, as the earth’s rotation slows and the days grew longer, we also experience a third change in the motion of the solar system which is the moon ‘s orbit drifting away from the earth. The two process are intimately linked. Why that is the case is another version of Newton’s conservation laws. As the earth slows down, much of its momentum is transferred to the moon which can then drift further away from the earth. In the above case the universe wants to preserve the angular momentum or the rotational momentum of the moon around the earth. As the earth slows down, the moon speeds up and moves away from the earth, thus preserving the rotational momentum of the combined earth moon relationship.

As the moon drift away from earth, we will have to change our notions of a month. Sometime in the future the moon may take 30 or 35 days to travel around the earth, thus reducing the number of months from 12 to 10.

The above three changes dramatically indicate how our solar system and planet have been transformed in our solar system’s relatively short life. 

                                                                 (7)

       The Theory of Gravity: How Newton and Einstein’s Theory Regulates our Solar System

To fully understand our universe and solar system we need to go beyond studying the above three changes in our solar system. Underling the previously discussed developments is the role gravity has played in shaping how our planet behaves in the solar system. 

As important as this idea is, the principles of gravity were not understood by the public until Newton invented his theory of gravity in the 17th century.

a.Newton

When Newton first came up with the idea of gravity, he overnight transformed our view of how the universe works. Prior to the 17th century the church had argued that the heavenly bodies operated on different principles form the earth. But now Newton was arguing that the same principles explained many disparate facts of life on in heaven as well as on earth. The most important of those principles was gravity, a universal force of attraction between all bodies of matter. He likewise argued that it varied directly with the size of an object and inversely with the distance between an object.

For example, his theory of gravity explains why in heaven all the planets and sun were round and why planets revolve around the sun. Conversely on earth his theory gravity explained why the atmosphere does not escape to space, why there are tides in the oceans, why mud slides and avalanches happen and why apples fall out of our hands. 

b.Einstein

While just about everyone admired Newton’s theory, some were troubled by Newton’s explanation of gravity. He seemed to advocate some unexplained forced that acted at a distance on various objects that nobody found satisfactory. After all, in everyday life when objects moved towards one another, they had to be either pushed or pulled together.  But Newton’s theory of gravity had neither of those two components.

About 100 years ago Einstein attempted to resolve these difficulties in Newton’s theory of gravity by arguing that gravity was not a force at all but merely a distortion or curvature in space time caused by the presence of matter or energy. For Einstein the space that made up our universe was like a rubber mat or a trampoline. If you subsequently had a large bowling ball that you could place on a trampoline or a rubber mat, the weight of the ball would press down on the trampoline or rubber mat and bend or curve it.  If you subsequently placed another lighter ball on the trampoline, it would naturally role toward the distortion created by the initial bowling ball. 

It was thus the curvature of space time, the very structure of our universe that we cannot see with our naked eyes, that explains why all bodies of matter were attracted to one another. There was thus  no gravitational force  that caused items to adhere  to one another. In the above example it was merely the curvature of the trampoline that explains why the smaller ball is attracted to the larger bowling ball. 

More importantly gravity also explained why the moon revolves the earth and the earth revolves around the sun. Because the weight of the sun curves space, the earth ends up rotating around the sun rather than flying away into space. It likewise explains why the moon’s gravitational pull accounts for our oceanic tides and the subsequent slowdown in the earth’s rotation on its axis.

While we humans can at best measure or see the effects of gravity, we lack the ability to see the actual causes of gravity which is the distortion that objects create in the fabric of space.

While astronomers and the Catholic Church had fought for centuries over how the universe operated, Newton’s theory of gravity as modified by Einstein and his theories of motion concerning inertia, finally provided people with a satisfactory account of both why and how our Solar System worked.

 

 

 

 

 


02/17/25 09:57 AM #518    

 

Bill Kelso

                                                          IV

                                                   Our Planet

Like our universe and solar system, the earth has undergone many changes over its relatively short life.  The appearance of the earth today is nothing what it was like in the past. It was not until fairly recently that scientists had a clear idea of how much planet had changed in its 4.7 billion years of history. Given the complexity of the topic, we hope to analyze the earth from four different perspectives.

First, we shall see how the earth’s sun, the planet’s shape, position in the solar system, and size affects its behavior today. If any of the above dimensions had been different, there probably would never have been life on earth at all.

Secondly, we will examine the physical makeup of the planet. While our earth was once a molten ball of fire, it has evolved from this hellish like appearance to a planet primarily covered in water to our present world in which 29% of the surface of the earth is land. We will also see that the makeup of the continents has constantly evolved over the planet’s history. Since people naturally want to more about their own country, we shall see how the plate tectonic revolution has affected the makeup of the US.

Thirdly, after explaining how the appearance of the earth has changed, we will see that its climate has dramatically fluctuated over time, swinging from a radically cold earth covered in ice to a radically warm planet experiencing temperatures significantly hotter than today. While today we are worried about global warming, a mere 10,000 years ago the earth finally emerged from an ice age that lasted 2 million years.

Finally, we shall look at the future prospects of the earth. As we learned earlier our universe will eventually disappear as the acceleration of the cosmos may eventually tear every planet and galaxy to pieces. Unfortunately, our planet will also self-destruct in the nearby future. While our universe may last another 14 billion years, the earth will probably self-destruct much sooner in perhaps several billion years.  In speculating about the future, we will see that there are three possible doomsday scenarios for the earth. We will try to predict which of the three options is most likely to occur first. 

                                                            (1)

                                      Why our Planet has Survived

a.Why the change in the heat of the sun is cause for concern for life on earth.

In a previous post we talked about how the solar system operates. In this section I want to focus on the unique and dramatically changing relations between our sun and our planet. I also want to show how the variation in the energy of the sun has affected our earth in the past and may seriously compromise its existence in the future.

The reason why this is the case is because the young sun was not always as bright and did not emit as much heat in its beginnings as it does today.

The more feeble and less energetic nature of the earlier sun may explain part why earlier periods of the earth were often colder than today. But the influence of the sun on the earth was tempered by the unusual atmosphere of our earth.  While today there is much talk about the impact of CO2 on our planet’s climate, we have to realize that in its early years, carbon dioxide represented over a third of the earth’s atmosphere while today CO2 is but a trace element in our atmosphere. 

In the early years of our planet the earth often escaped extreme periods of cold because the higher percentage of CO2 in the atmosphere acted as a greenhouse gas and trapped the heat of the sun.

Conversely, when our sun began to heat up and become more energetic, there was the danger that the earth would become overwhelming hot, evaporating away the water in our oceans. However, this scenario never occurred because as the sun heated up, the gashouse gases of CO2 began to decline from 30% of the atmosphere to 20% then 10% until today when it only constitutes four tenths of one percent. Our earth is currently livable because the changes in our atmosphere have offset and mitigated the changes in the solar output of the sun.

However, the future of the planet may not be so bright. The sun is continuing to grow hotter and for the first time in many centuries the amount of CO2 in the atmosphere is likewise increasing. As we shall see at the end of this post, this changing relationship between the sun and out atmosphere is one of three reasons why the future of the planet will eventually come to an end.

b. Why Does the Location of our Planet in the Solar System Matter?

If potential future increases in the temperature of our planet explains why its future may be precarious, our planet’s location in the solar system helps us understanding why it was possible for our planet to initially create life on earth. Today we know that the earth is the third planet from the sun. That location is important because regardless of the changing nature of the sun’s temperature, if the earth were closer to the sun, like Venus, the earth would be so hot that any water on the planet would have evaporated. Conversely if the earth were further out like Jupiter or Neptune, the planet would be so cold that it would also have been impossible for life to evolve. Our present position in the solar system is often called the sweet spot or the habitable zone of a solar system. When astronomers study other solar system, they are always looking for planets like our earth that occupy that sweet spot.

c. Why is the Size of the Earth Important?

Thirdly in addition to our location and interaction with the sun, the size of our earth also matters. If our planet were much bigger the pull of gravity would have been so strong that it would have been impossible for us to walk. The immense gravity would have also made it impossible to form large and expansive mountains ranges like the Rocky Mountains or the Alps.

Conversely if the earth were much smaller, its diminished gravity would have made it much harder to hold on to our atmosphere. But even more importantly if the earth were smaller, the planet would have cooled faster, thus destroying the magnetic field our earth’s molten interior generates, which protects us from the sun’s cosmic ray.

Whenever an electric current is moving it creates a magnetic field. Inside our earth’s hot interior, the movement of molten lava creates such a current which today shields our earth from harmful solar rays. We can see the efforts of that magnetic field in northern areas like Alaska or Norway in what today is called the northern lights. As our magnetic field funnels charged particles from the solar wind towards the Earth’s poles, they coincide with gases in the upper atmosphere creating the light show called the norther nights or more commonly Aurora Borealis.

If the above magnetic field had not blocked the cosmic rays or wind from the sun, the sun would eventually have blown away our atmosphere making it impossible for life to form on our planet.  

The latter case may be the situation with Mars which is only half of our size. At one time it may have had an atmosphere but as the planet cooled fairly quickly because of its small size, it lost its magnetic shield and then its atmosphere.

d. Why is there Water on the Earth?

When our solar system was created there were four interior rocky planets (including Earth) that are generally dry and four outer planets that are primarily made up of gas and ice. Because of this division in our solar system, astronomers have always wondered where the earth got its large amount of water that created our oceans. One very dominant opinion is that comets and meteorites from the outer plants are responsible for the creation of our many oceans. If it were not for this interaction between the interior drier and the wetter outer planets our planet would not be like the earth we know today.

e.Why is our Planet Round?

A final issue about our planet that elicits comment is the ever present question as to why the earth is round. Ever since we have attended grammar school, we are taught that that the earth is round. But that leaves unanswered the question why that is the case. The answer is our old friend gravity. Our planet as well as all other planets and our sun are all round because gravity will transform any cloud of dust into a round sphere. 

This observation only reinforces the amazing significance of Newton’s theory that gravity rules the universe. While an apple falling to the ground, the presence of high tides in our oceans, the revolution of the earth around the sun, avalanches on the side of a hill as well as the apparent round nature of our planet all seem to be totally unrelated events, Newton was able to realize that each of these apparent disparate events actually had the same cause. 

Whereas before Newton, people had no idea how the universe and its complex interactions worked, Newton showed that a simple law explained many events in our world. Newton’s discovery thus proved that there was some coherence and logic to the way our world operated.

                                                                 (2)

                                    The Changing Appearance of the Earth

In the above section we analyzed how the size, makeup and location of the planet enabled our earth to create complex life forms. In this second section we want instead to provide more of a descriptive picture of how the earth has changed over time. After we describe how the physical appearance of the earth has historically evolved, we will see how its climate has also varied in the course of its relatively short life.

a.A Brief History of the Earth's Geology

To appreciate how the makeup of the earth has fundamentally changed over time, we could argue that the earth has altered its appearance three time.

1.Dante’s Inferno

When the earth first appeared it was a molten ball of fire in which massive volcanoes spewed out toxic chemicals.  During this time the earth was also being bombarded by many meteorites which contributed to the hellish nature of the early earth. In the middle ages there was a famous book called Dante’s inferno and that title was descriptive of our early earth.

2.A Watery World

In the second phase the internal molten nature of the earth began to cool, stabilizing the outer surface of the planet.  While the internal makeup of the earth became less volatile, the earth also witnessed a barrage of comets who began to transform the earth into a watery planet. By around 2 million years ago, our planet was essential a sea world as around 90% to 95% of the planet was covered in water. There were no continents like Eurasia for terrestrial plants to occupy.

3.The Growth of Continents

Fortunately, the watery world was merely a passing phase in the history of the earth. In its third phase the earth began to resemble the earth we know today around 2.7 billion years ago.  With time the molten interior of our earth began to produce a new kind of rock formation called granite that was buoyant which quickly began to float to the surface of the ocean creating the land masses that we today call continents. Over the next several billion years the earth acquires its present appearance in which 29% of the earth surface is made up of land and 71% consists of water. 

But this land is nothing like the land we see today. The continents were large dusty plains lacking in any kind of green plants and animal life. It was not until 460 million years ago that plants began to colonize our continents developing the forest and grassland that characterize the planet today.

b. The Idea of Moving Continents

While geologists finally began to study our planet, they initially through that the earth’s five continents had always existed in their present form. Unfortunately, it took them several centuries to finally appreciate how the makeup of the continents had also been transformed over time.  Not until the middle 1960s when the Plate Tectonics Revolution occurred in geology, were geologists aware that our continents floated on a variety of movable raft like plates that were constantly moving. Because the interior of the earth has a molten out core, it generates heat within the earth’s interior which created convection currents in the mantle causing the tectonic plates to shift and slide about. 

In some cases, the earth’s convection currents may cause the various continents to crash into one another creating one gigantic continent.  That was the case during the early Age of the Dinosaurs when they lived on a massive continent called Pangaea. But as they did more research, geologists found that the earth has had perhaps two and even possibly three massive continents like Pangea 

At other times the earth’s interior heat may break up rather than consolidate continents. That has been the situation for the last 200 million years as a variety of rift valleys split Pangea into the present five continents that currently make up our world. 

c. New insights in Geology

The plate tectonics revolution had an immense impact on the field of geology. Prior to this revolution in the 1960s geologists never had a satisfactory explanation as to why mountains existed or why they were only found in certain parts of a continent. When they realized that continents often crashed into one another or were broking up by rift valley, they finally had a theory to explain the geological world around them. 

d. The Impact of Plate Tectonics on the Makeup of America

While the study of our changing planets is a fascinating topic, perhaps because of our limited time, we should finish by showing how the plate tectonics revolution even changed our understanding of our own country.

Like Africa America has had significant rift valleys caused by the interior heat of the earth remaking our national geography. Before those rift valleys occurred, America crashed into Europe helping to create the super continent of Pangea. One consequence of the collision was the creation of the Appalachia Mountain chain over 300 million years ago. When that super continent subsequently began to break up around 180 million years ago, a rift valley split America from Europe. The mountains of eastern Norway, Eastern Scotland and Appalachia were all created by the collision and then the separation of the continents during this period of geological activity. 

Besides the above major rift valley there was another smaller and less successful rift valley in America that initially tried to split the American continent in half. When it stalled out it created a depression in the middle of the continent that led to the development of our Mississippi River.

e. How our Continent and Country will eventually Disappear

Although our continent of North America appeared 180 million years ago, geologists calculate that in another 250 million years it will disappear as it collides with China. Because California moves about one inch closer to Asia each year, it will eventually become part of the large Eurasian continent . Just as there once was a gigantic continent Pangea that split into five separate continents, in the future the five separate continents may be reassembled into yet another super continent.

                                                                (3)

                                    The Changing Climate of the Earth

Today there is much talk about climate change. In this third section of this post, we hope to show that the climate of the earth has never been overly stable or constant in nature. At its birth the earth was a molten ball of fire. 

a.A World of Heat. 

At the same time there have been other periods in our planet’s history where the earth created hothouse like conditions through a super greenhouse effect. While today we are worried about the growth of CO2 in the atmosphere, the earth’s atmosphere presently has only trace amount of carbon dioxide at .04 while 78% of the air is nitrogen and 21%. of the atmosphere is oxygen.  

However, as explained previously, for most of the earth’s existence CO2 has been around a third of the world’s atmosphere and it has only declined significantly over the last 200 million years.  Even in the age of the dinosaurs, carbon dioxide levels were close to five to 10 time higher than we are currently experiencing. In the Jurassic period temperatures were anywhere from 15 to 18 degrees hotter than today and no part of the earth was covered by ice. 

b. A World of Ice

While the earth has had numerous period of extremely warm temperatures, twice in our planet’s history the earth was a snowball earth completely covered in ice and devoid of life. In addition to these extreme periods of cold, the earth has suffered from 5 other ice ages in which part of the earth was covered with snow, the last period ending only 10,000 years ago. The Great Lakes were created when the snow covering the middle of America finally melted while Long Island, off the coast of New York City, was debris left over from the advancing glaciers on the east coast. 

We thus have to realize how unique our present climate is. Historically the earth has fluctuated between very cold and very hot and human climates. After all, only 10,000 years ago the world was in the midst of an ice age that covered all of Europe, Canada as well as New York City and the upper middle west. Based on the past history of our globe, it is probably the case that the benign climate of the last several thousand years will not last indefinitely. 

c.The many factors that shape the Earth’s Climate

There are many factors that can alter the earth’s climate most of which are beyond human control. Below is a list of five natural events as well as a human event that can affect our climate. 

1.How Hot and Energetic is the Sun

As the Sun becomes both brighter and hotter over time it can dramatically heat up the earth. Its success in achieving that goal, however, also depends on how many greenhouse gases exist in the atmosphere of the earth. If the sun becomes hotter but the percentage of CO2 in the air declines, the climate might remain relatively constant. But in the future, it appears that both the temperature of the sun is likely to increase and the percentage of carbon dioxide in the atmosphere is bound to grow.

2.The Orbit of our Planet

a.The Orbit of the earth may vary by becoming either more elliptical or circular in nature? If the earth’s orbit becomes more circular the planet’s climate will become warmer, but if it becomes  more elliptical it would become cooler.

b. The Tilt of the Earth. If the earth become more tilted, our planet would experience much hotter summers.  

c. The Wobble of the Earth on its Axis. Finally if the Earth likewise increase its wobble on its axis (called axle precession) it would also increases its temperature during the summer season.

3.The Activity of Plate Tectonics

Similarly the activity of Plate Tectonics and the resulting volcanic activity can affect how much carbon dioxide is in the atmosphere. In most volcanic eruptions 35% of the discharge is carbon dioxide and 13% sulfur, another greenhouse gas.

4.Volcanic Activity & the Atmosphere

If volcanic activity increases the production of greenhouse gases, it may also release enough volcanic ash into the atmosphere that it may block sunlight hitting the earth temporarily cooling the planet. Volcanic activity can thus both enhance as well as mitigate global warming.

5.The Location of our Continents and Ocean Currents

If the location of our continents changes it may alter wind and ocean currents prompting climate change.

6.Human Activity

Finally as the news media constantly reminds us human activity in burning fossils fuels can likewise alter the climate.

                                                              (4)                      

                          The Future of the Earth: Three Doomsday Scenarios

Astronomers think our solar system, like our galaxy is in middle age and the sun and solar system will die out in several billion more years. In the final section of this post we need to ask why the planet’s future is so endangered.

As of today there are three main theories as to why our planet will self-destruct way before the universe dies out. 

The first theory which will probably be the last reason the planet dies, argues that the planet will be totally incinerated when our sun finally runs out of fuel and explodes. As the sun runs out of fuel it contracts and then ignites a shell of hydrogen around the core pushing the outer layers of the star outward that will eventually consume the earth. This option may occur within 5 billion years from the present.

The second theory of the earth’s demise focuses on the growing heat of the sun as it ages. As the sun warms up, it will eventually also heat up the air and perhaps boil away our oceans and turn all water supplies on earth into water vapor. This option will probably occur several billion years before the sun collapses.

The third and final theory argues that earth will die because our planet will eventually cool and the molten interior of the earth will cease to exist. As the molten interior declines, the earth will lose its magnetic shield which prevents solar winds from destroying our atmosphere. This last theory will probably be the earliest reason why out planet will eventually experience the same fate as our neighbor Mars.

In light of these three options, it is also easy to understand why so many astronomers today are trying to find other planets and suns that can sustain complex forms of life. The hope is that before our solar system and planet eventual dies, that we will be able to send colonies to another planet. While that option will eventually also expire once the universe comes to its end, it will at least enable humans to live another day. 

 

 

 


02/18/25 01:24 PM #519    

 

Bill Kelso

                                                 

                                                  A Postscript

                                        Why the Sun is Getting Hotter

After the last post I was asked why the sun is getting hotter. I originally left that material out of the last commentary as the post was getting too long. Also I thought if people were going to read these commentaries they probably wanted at best a quick overview rather than something that was too technical in nature. However, in case you are interested in this subject, the topic is an fascinating study of how the natural sciences have come to better understand our world. What is interesting about the question our classmate asked is that until about 120 years ago, nobody in the world had any idea why the earth’s sun was becoming much warmer.

                                       (1)

                          The Nature of Matter

The first breakthrough occurred because of another insight by the man who dominated 20th century physics Albert Einsten. Prior to the turn of the 20th century, people thought energy and matter were two very different substances. However in 1905 Einstein argued that matter and energy were the same thing, that  they were merely two states of the same substance. This concept which today is known as mass energy equivalence essentiallymeans that mass and energy are interchangeable forms of the same thiing.

                                                               (2)

                                          How Much Energy is in Matter

Not content with the novelty of this insight, Einstein went one step further and calculated how much energy is in any piece of material. He achieved this in the following very famous equation:  

                                                              E = MC2

He argued that the amount of energy in any object could be found by multiplying its mass by the speed of light squared. The significance of this equation is startling. If you happened to walk in your backyard and found a small rock you might think it had little energy in it. But as soon as you realize that the speed of light is 186,000 miles per second, and that number when squared is 34,596,000,000 miles per second, you quickly realize even the smallest rock possess a tremendous amount of energy.

                                                                (3)

                                     How does the Universe create Energy

Once scientists realized how much energy is contained in the mass of objects, they began to wonder how the various suns in the universe generated the energy to light up their solar systems, They initially thought there were two answers.

a.Fission

First they hypothesized that our  sun could be splitting complex atoms in half to generate energy, a process known as fission.

b. Fusion

However a second option they entertained suggested the various solar bodies might be combining atoms, rather than splitting them  apart to generate sun light, a process known as fusion.

Since the early universe was primarily made up of simple atoms like Hydrogen and some Helium, astronomers deduced that the sun was generating its energy primarily through fusion, or the process of combing different elements together. 

When they looked up at the sky during a bright day scientists were estimating that that number of hydrogen explosions was immense. During an average day of sunlight the sun was experiencing over 100 million hydrogens bombs exploding simultaneously. 

                                                                  (4)

                            Why is our Sun getting Hotter as it gets Older?

In  light of the above findings, we can now understand why the sun is getting hotter. When our sun was first formed it was primarily made up of hydrogen atoms. But once nuclear fusion began, the sun started to fuse together simple hydrogen atoms resulting in the release of a tremendous amount of energy. But when it fused two hydrogen atoms together it created the much heavier chemical elements like helium or oxygen. As these heavier elements proliferated, they began to sink into the core of the sun making it much more dense and significantly hotter. The longer the fusion process goes on, the denser and hotter the sun becomes which eventually affects the amount of sunlight that hits the earth.

While our sun when it was first created was rather dim and nowhere as hot as is presently the case, it has become significantly hotter with the passage of time. Fortunately the decline of CO2 has mitigated the increase in the overall temperature of the sun. But sometime in the distant future, the temperature of the sun will increase to such an extent that it probably will jeopardize any life forms on earth.

 

                           

 

 


02/19/25 01:21 PM #520    

 

Bill Kelso

                                                           V

                    The Growth of Life in Our Corner of the Universe

The development of life on earth  has always been a controversial topic.  A perennial issue is the question of whether life on earth is a unique and rare event or whether life is widespread in both our galaxy and universe. 

a.The Abundant Life versus the Rare Earth Hypothesis

As astronomers discovered that the universe was full of galaxies rather than just solitary stars, they surmised that there must be billions of other solar systems that could and probably did support life. For them life was a common and abundant feature of our universe.

However, the opposing view, which is called the Rare Earth Hypothesis, argues that the odds of creating advanced or intelligent forms of life are so rare, that we human on earth may be the only advanced form of life in the cosmos. If you recall our previous post about earth, you will recall that only certain types of fairly rare planets can sustain life.

For instance, a planet would have to be in that sweet spot of being close but not too near its sun. It would also be desirable if the planet were of medium size and neither too small nor too large. If it were too small, it might be unable to retain its atmosphere while if it were too big the planet’s strong gravitation pull would prevent animal life from moving at all. Likewise, a planet might need to have a moon to prevent it from spinning to fast if it wants to have a normal period of daylight.

b.The Darwinian versus the Punctuated theory of Evolution

The above dispute between the Rare Earth and the Abundant Life school reflects the earlier discussion we had about the Punctuated Theory of Evolution. While most biologists thought up until the 1960s that life was generally stable on earth and only incrementally changed over time, its opponents argued that life was more volatile and unpredictable in nature. 

But equally important, the advocates of Punctuated Equilibrium also insisted that evolution was often driven by a range of factors such as the impact of a meteorite that traditional biologists had ignored. 

In this post and the following one about the evolution of modern humans, we will see that the traditional view of evolution taught in high school about the impact of natural selection on genetic mutations is only part of the story. In its place we will see that plate tectonics and rift valleys as well as comets and meteorites may be equally important in the creation and design of life. 

This point is important because if the creation of intelligent forms of life were caused by a wide array of factors ranging from geological disturbances to cosmic events, it lowers the odds that other planets might reproduce the kind of life forms found on earth. That is especially the case if the origin of human life on earth seems contingent and even accidental in nature.

                                                              (1)

                                              Origins of Life on Earth

                                                    The First Phase

To develop this argument further we need to look first at the creation of life on earth. Before life could appear on earth, it had to go through 3 distinct phases before it was capable of supporting complex examples of life.  In the earth’s 4.7 billion years of existence the first phase lasted about a billion years. Surprisingly enough, this phase which actually did not see the creation of any life at all, was most remarkable for its development of an environment that could support and sustain diverse life forms. 

a.The Evolution of a Sterile Environment

To appreciate the above argument, we have to realize that the initial universe possessed a basically sterile environment because of its simple chemical makeup.  When the universe was first created in the big bang, it consisted of just the two elements hydrogen and helium. Because there were no complex chemicals like carbon or oxygen in the early universe, it was impossible for any kind of sophisticated or complex forms of life to evolve.

However, after the passage of time, when the hydrogen and helium formed stars in the early universe eventually exploded, the situation changed dramatically. As primitive stars of the early universe ran out of fuel, the heat of their subsequent supernova blasts created new minerals such as silicon, carbon or iron which eventually could sustain life forms like plants or animals. We have to remember that the chemical elements found in the periodic table that people study in high school chemistry classes today, simply did not exist until the early primitive stars of hydrogen and helium blew up, creating a whole new array of chemicals.

These newly created chemical elements which were dispersed into outer space eventually formed giant gas clouds. While it is unclear as to what events actually caused the resulting gas cloud to congeal, it is possible a nearby star exploded, condensing the above gas cloud into our modern solar system

b. The Creation of a Longer Day

Secondly, as we learned earlier, even when our solar system possessed its enriched set of chemicals, our earth was spinning so fast, that the average day only lasted 10 hours. At that rate of rotation, there is no way the early earth could have supported any complex form of life. Any major forms of animal or plant life would have lacked an environment that would have provided them with the time to obtain food and to rest at night.

However once the planet Theia smashed into the earth and created our moon, its gravitational impact on the earth eventually slowed down the rotation of the earth, creating our much longer and life sustaining days. During this first phase, our universe as well as our planet which had initially been hostile to creating any form of life now possessed the chemical building blocks necessary to build as well to sustain life.

                                                                 (2)

                                                    The Origins of Life

                                                     The Second Phase

But even with the above advantages, when our planet was finally able to support life around 3.7 billion years ago, the appearance of life forms on earth was rather a prosaic and non-spectacular event. After being sterile for a billion years the earth finally acquired very simple microscope forms of life called microbes. But over roughly the next 3.2 billion years, those microscopic forms of life barely evolved.

This extended period of time raises the interesting question of why or where did life finally emerge on our planet. There are two main contending theories. 

a.Volcanic vents creating Rift Valleys

The first theory argued that life arose in the volcanic vents that caused rifts in our world’s continents. Allegedly the heat that causes the transformation of our geology also generated new forms of microorganism that were a primitive form of life. 

b. Microbes from outer Space

However, a second theory argues that these early microorganic forms of life including simple bacteria may have originated in space. This theory which is called panspermia has several different versions. The most intriguing one suggest that the earliest forms of life may first have appeared on Mars and then subsequently migrated to earth. Due to the activity of a meteorite, Mars may have helped life to colonize earth. 

Regardless of which theory we subscribe to this second explanation suggest that very primitive versions of life may be widespread in the universe as a whole. Perhaps it may suggest that the theory that life is widespread in the universe may even be true. 

While the story about the origins of life is intriguing, the aftermath of that event is rather boring and uneventful. As noted above, once these simple forms of life appeared on earth, nothing much happened for the next 3.2 billion or so years. 

It was not until roughly 550 millions years ago that more complex forms of life such as plants, or amphibians or reptiles finally appeared on earth. For the longest time the earth was a dusty planet covered only by dirt and totally barren on any form of life. As the theory Punctuated Equilibrium argues there are often prolong periods of stasis followed by dramatic periods of creation or destruction during evolution.

                                                              (3)

                   Why did it Take so Long for Life to Evolve in our Universe       

                                                   The Third Phase

After a prolonged period of stagnation, the scenario predicted by Punctuated Equilibrium finally occurred. In the third and final phase life exploded on the planet beginning a roller coaster ride in which periods of rapid growth of new complex forms of life like fish, mollusks reptiles or mammals were then followed by periods of mass extinction, which in turn were followed by yet renewed periods of life. 

This first and initial burst of life, which today is known as the Cambrian Explosion, occurred roughly 540 million years ago. 

If you judge this period of dramatic creation and mass extinction by the notion of human history, it may seem like a long drawn-out period. But if you judge this alternating pattern of mass creation followed by mass extinctions and rebirth in light of the earth’s history, it all occurred in the blink of an eye. In the 4.7 billion years of our planet’s existence, only in roughly the last 500 million years have significantly life forms existed. 

a.How Oxygen created Complex Life Forms

That example naturally raises the question as to why it happened.The simple answer is the growth of oxygen. While the earth could sustain simple forms of life with its advanced chemical makeup and lengthening days, it could not develop more complex examples of animals or plants without the presence of oxygen. 

Why is that the case? When animals consume fuel they need some method to extract energy from that fuel. With the presence of oxygen animals can engage in a process we call respiration that enables them to conduct a controlled chemical burn of their food or fuel. In an anaerobic environment or one without oxygen animals cannot obtain enough energy to live a complex and active lifestyle.

Even though the simple microorganism could generate small amounts of oxygen, it took a while before there was enough oxygen to support large complex forms of life such as plants or animals. Fortunately, with time blue green algae developed photosynthesis which converted CO2 into glucose which fostered the growth of green plants and later the numerous animals forms found on the planet today.

b. The Fluctuating Levels of Oxygen on Earth

While the growth of oxygen explains why major forms of life finally appeared on earth, the development of oxygen often fluctuated widely. Initially once complex life forms evolved on earth, the planet’s atmosphere contained only around 10% oxygen as opposed to the 21% it presently registers. But over time the numbers have been as low as 6% and as high as 35%

c.How Life Came to Colonize Land

Because the initial levels were so low, animal and plant life could only exist in the oceans which shielded them from the dangerous rays of the sun. While there was a dramatically growth of complex life forms around 540 million years, those enhanced life forms were not able to colonize land until roughly 55 to 60 million years later. Why was that? Until oxygen levels dramatically increased to create an ozone level over the earth, life forms were subject to harmful solar radiation if they ventured on to land. Prior to this phase, the waters of the oceans had protect animal life from the dangers of intense sunlight.  But once the ozone level had grown sufficiently to the point where it could effectively block out harmful ultraviolet radiation, animal and plant life could safely colonize the earth’s continents.

d.The Challenge Facing life in a Low Oxygen World

While the growth of the ozone level was a necessary change, it was not sufficient to facilitate animals successfully colonizing the land.  Even when microscope life was sufficient to create the ozone shield the levels of oxygen were still lower than what we find today. As mentioned above, today 78% of the atmosphere is nitrogen and 21% is oxygen. But if we return to the earth 550 million years ago, the level of oxygen was a more inadequate 10%. 

e. The Growth of Air Pumps or Lungs

Unless an animal was extremely small it would have had a hard time acquiring enough oxygen to sustain itself on land at this level of oxygen. The final piece of puzzle that that was necessary for our ancestors to colonize land was evolution of an effective set of lungs to breath. In water most fish use a passive set of gills to extract oxygen from the oceans. But once animals tried to venture onto land, they needed to have a more effective set of lungs to replace gills if they wished to effectively metabolize their foods.

For our mammals in general and our human ancestors in particular the development of the diaphragm which is in effect a human pump for acquiring the necessary oxygen achieved that goal. The diaphragm is a large muscle at the base of our lungs that enables us to breathe by the muscle contracting and flattening when we inhale, which creates space in the chest cavity for the lungs to expand and pull in air. 

If you are unclear about this procedures, try breathing while you are reading this post and you can feel your diagram moving up and down. While today we have man-made pumps, mother nature made human pumps millions of years earlier which enable our distant ancestor to successfully colonize land.

Finally our diaphragm is not only a human pump that helps us inhale and exhale, but it is also a pump that can increase abdominal pressure which assists us in passing urine and stool. The diaphragm is thus a dual purpose pump that enabled all mammals to adjust and survive in an earlier environment that was much harsher than our present environment.

Unfortunately, today people may not appreciate the significance of this simple change in our anatomy. When the atmosphere’s level of oxygen was around 15% or lower many millions of years ago, most animals were probably incredibly sluggish and their life was a struggle. The growth of an air pump thus helped us to survive when oxygen levels were incredibly thin. 

f. How Air Pumps Affected McClatchy’s Football Team

Ironically enough, an evolutionary development that led our ancestors to survive a period of low oxygen, eventually enabled humans to live an incredible vigorous and active life when oxygen levels rose to 21%. If you ever attended a McClatchy football game in the 1960s you have to realize that the fancy and energetic running of backs like John Anderson, Tommy Relles, Mike Nishio and Tom Tash would never have been possible without our air pumps.

You also have to realize that if the level of oxygen which only reached 21% around 30 million years ago declines significantly in the future, our urban civilization would dramatically change for the worse. Even with an air pump, if oxygen levels hit 15% it would be impossible for anyone to engage in a myriad array of activities, we take for granted such as playing sports, traveling to distant countries, working long hours at the office or staying out late at night on a date. The situation would be comparable to the whole world suffering from COPD, wearing oxygen masks while living at a rest home for the elderly. With those levels of oxygen, the ability of people to enjoy a productive society living a normal active life and consuming household and consumer good would also be severely compromised.

                                                           (4)

                                      The Final Piece of the Puzzle

                                   Further Evolutionary Developments

a.Origins of Mammals                 

While the above discussion explains the early development of life on earth, we don’t have time to examine all the steps that finally lead to our species. To save time we now need to skip over many millions of years to focus on developments that led to human evolution.  Of all the animals created in the last 500 million years, that one that is most relevant for our purposes is the development of the mammals. These were the first animals that were warm blooded and produced milk for their off springs, who are our first major ancestors, and they appeared around 220 million years ago. But while mammals appeared relatively early in the history of the planet, they were mainly small rodent like animals who tried to stay out of the way of the large dinosaurs that then dominated the world.

b.When did our Mammals Ancestors Dominate the World

However, around 66 millions years ago an asteroid hit the earth killing of the dinosaurs which enabled the then small mammals to take over the world eventually leading millions of years later to the rise of modern homo sapiens.

c.Why Did Out Early Ancestors Decide to Live in Trees

Why did our earliest mammal ancestors, who were like small rodents, eventually decided to live in the canopy of the rain forest?  The main reasons is that they hoped to avoid land based predators who were rapidly filling the empty niches in land that resulted from the death of dinosaurs. Since most land predators were four legged, they could not attack our early ancestors who were high up in the trees.

In the forest canopy our mammalian ancestors quickly evolved into three different species.  The first species to develop were the monkeys who walked on all four of their hands and feet on the top of tree branches Secondly were the chimps who swung underneath the tree branches (a process called brachiation) and thirdly were the early Homo Sapiens who were unique in that they walked upright on just their two legs on the top of the forest canopy. 

When monkeys became heavier one set of monkeys the baboons began to forage on land while relatives of chimpanzees who likewise became much heavier retreated to the ground and today are called great apes. Finally when our ancestors were forced to climb down from the trees as the rain forest was dying out, and started to permanently live on the ground like the baboons and great apes, they became known as Ardipithecus. 

                                                              (5)

                                      Why the Future is Problematic

While the study of our mammalian and primate ancestors is naturally of interest to us it should not distract us from the larger question of what is the future of life on our planet?

The rather checkered and variable history of our planet raises troubling questions about what lies ahead. In the 500 million years since the Cambrian explosion the earth has experienced 15 periods of massive die offs, including 5 main extinctions in which 75% to 90% of all species on earth were wiped out.

a.Why Massive Die Offs Occur

At the present time, there is intense debate as to why there have been so many periods in which so many species died. Currently most people think there are a variety of reasons. The include meteorites that may have attacked the earth, destroying in the process most of the vegetation on earth. Yet others have suggested that the volcanoes created by continents crashing into one another by plate tectonics may have created such a toxic atmosphere that it led to a massive die off. Finally many analysts think the fluctuating nature of oxygen in the air may also be responsible for the demise of many life forms as animal and plants suffocated to death.

Regardless of its causes mass extinction of so many plants and animals, as well as the fluctuating levels of oxygen in our atmosphere suggests that the future of the planet may be problematic.

As we mentioned at the beginning of this post a week ago, for the longest time natural and social scientists believed otherwise as they insisted that the world was generally stable and that any change on  earth was most likely to be incremental in nature. Given our rather short time perspective as humans, it is easy to understand why scientists assumed that the future would be as the same as in the  past. Today we know that optimistic scenario may not be warranted. In light of the above changes on our planet we have to realize that even if humans and other forms of life survive, they may face difficult and challenging times many centuries into the future. In the 10,000 years since the last ice age ended we have built a major civilization. But it is an interesting question what our civiliztion will look like in another 10,000 years.

b. The Good Fortunes of our Generation

Our generation should be thankful that we just happened to live on our planet in a period of relative stability in which neither the climate, oxygen levels or die offs have significantly affected our lives. As we face the prospects that our time on earth is limited, we should be thankful we lived in a relatively stable and enjoyable period in the history of the earth.

 

 


02/20/25 04:48 AM #521    

 

Roger Kircher

I'm enjoying your posts Bill, keep'em coming please.

 


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