Thursday, June 18, 2009

Why I think Gaia Theory is, well, silly

The only way one can think that is planet is a wonderful nurturing Earth-Mother superorganism is to be ignorant of the history of this planet. For most of the last 4.5 billion years, if we were living on another planet and spectroscopically analyzed Earth from a distance, we would have said, "Yuck, unbreathable atmosphere... no sense going to the Sol system." For most of the time, we humans, were we just plopped down on Earth, would have promptly expired.

I am certain that life has altered the atmosphere and the geology of the Earth. This does not make it the best of all possible worlds.
http://judson.blogs.nytimes.com/2009/06/16/guest-column-heavy-weather/

I am fairly certain that Venus and Mars were similar to Earth and had oceans for the first billion years or so, and I am also fairly certain that they had life. That life was unable to control Venus, and its surface is now sterilized by high temperatures. Mars almost certainly still has life, but again, life was not able to maintain a clement planet, and most of it is now in a deep freeze.

For those of us fortunate enough to live in the first part of the 21st century and fortunate enough to live in one of the wealthier countries and be in one of the wealthier classes, it seems that things are wonderful and always have been so. Place our lives in the context of the last 100,000 years of human existence, and we see we have won the biggest lottery of all time. We marvel at it all because we live in a special time. Plop us down in any other time in the past (and possibly the future) and we would think we were living in Hell.

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