Friday, March 22, 2013

A thought about man and the universe.

New research results indicate that the universe is some 13.8 billion years old. No one knows how many galaxies exist in the universe, but there are more than 100 million and maybe as many as a trillion. Galaxies come in different sizes, but we can say that there are an average of perhaps between 100 million and one billion stars per galaxie. So maybe there are 1,000,000,000,000,000,000,000,000 stars in the universe. A recent estimate based on astronomical investigation of our region in this galaxy was that there are an average of 1.6 planets per star. I discovered a reference that says that "(t)he National Science Foundation’s “Tree of Life” project estimates that there could be anywhere from 5 million to 100 million species on the planet, but science has only identified about 2 million." There are now more than 7 billion members of our species alive. Perhaps we represent between six and seven percent of all the members of our species who have ever lived. Maybe I am not as important as I might have thooght.

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