A History of Environmental Catastrophes

 

Monument Valley on Arizona-Utah border

These photos were all taken on an earlier trip to Arizona.

David Attenborough in his documentary summing up his life abandoned his traditional approach of nature documentaries where he carefully avoided making personal statements. This time he made exactly those statements he had avoided in the past.

Attenborough had travelled to every part of the globe. Sadly, I have not, but I have travelled extensively and have seen some remarkable things too and have given some modest thought to the same issues that have been bothering him. Like him I have been to some extraordinary places as well. Perhaps I have a little something useful to contribute as well. I have been around for 74 years and likely will not be lucky enough to live another 20 years like he has done. As he showed in his film, I will also include in these posts to follow some photographs of where I have been and creatures and organisms I have been lucky enough to see.

North Window Monument Valley

When Attenborough was very young, in 1937, the human population was “only” 2.3 billion, there was “only” 280 parts per million of carbon in our atmosphere and 66%n of the world’s wilderness remained intact. Since then, things have changed dramatically and our species is largely responsible for that. Today there are more than 400 parts per million of carbon in the atmosphere.

Artist’s point was a favorite spot of the director John Ford who shot many of his westerns starring John Wayne in Monument Valley

Scientists have learned that over the nearly 4 billion years that life has lived on this planet, life has changed dramatically. Usually it has changed slowly, but it has always changed and given millions of more years the changes are likely to be astounding.

Over time, some species die out. New species evolve after organisms adapt to changes on earth. It is an amazing process. After about 4 billion years bacteria can evolve into humans. Think about that.  Our earliest ancestor was something in the nature of bacteria! Life has evolved from microscopic organisms to giant creatures. Some creatures on the other hand, like crocodiles have hardly evolved at all.

 

Totem Pole at Monument Valley

About once every 100 million years or so, planet earth has experienced truly catastrophic losses of species. These are called extinction events.  There have been 5 such extinction events. One of them led to the loss of about 95% of the species on earth. And what remained have evolved into the incredible array of biodiversity we have today. An enormous number of organisms have died out. An enormous number of species have died out too.

Great natural forces have also impacted the earth and the creative organisms on it. For example, one of my favorite places on earth is Monument Valley in northern Arizona. I am constantly amazed by the large number of people that come regularly to Arizona like we do but have never visited this place of such astounding beauty. I think it might be the most beautiful place on the planet yet far more people I meet here have been to Las Vegas than Monument Valley even though both are similar distances from Phoenix. The powers of erosion by wind, water, and ice applied to geological forces that created the enormous changes to the landscape including carved mesas and buttes.

Change is a relentless part of life. The only thing constant is change. We must live with it or die. No matter how much some us hate change we cannot avoid it. Mother Nature never stands still.

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