Origin of Life; Early Earth atmosphere (Introduction)

by David Turell , Saturday, December 03, 2011, 15:36 (4717 days ago) @ dhw

http://www.sciencedaily.com/releases/2011/11/111130141855.htm

It appears that 500 million years after the Big Bang (assuming the Big Bang happened), the Earthâ€™s atmosphere was more like it is today than the other scientists thought.

Watch your timing! The BB was 13.7 billion years ago. The sun appeared 5 billion years ago and the formed planets about 4.5 billion years ago. So the 500 million you are tossing about is in Earth age and puts us at 4 billion years ago for the atmosphere discussion. L ife definitely apppeared about 3.6 billion years ago, but possibly as early as 3.8 billion years ago. That's as quick as 200 million years to make life from non-life.

Ah well, life is still fun when youâ€™re stuck on Square One.

I would say square One plus a quarter. Knowing what the air was like is important to the various theories.

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Origin of Life; pre-planning - David Turell, 2011-10-05, 18:35
- Origin of Life; pre-planning - dhw, 2011-10-06, 17:09
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Origin of Life; Early Earth atmosphere (Introduction)