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Science

(5,214 posts)

3. "A minimum of 3x10-4 times present levels."

Sat Sep 28, 2013, 02:28 AM

Sep 2013

What is the lowest, if any, level of O2 needed for life to arise?

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Earth Had Oxygen Much Earlier Than Thought [View all] Eugene Sep 2013 OP

Interesting. longship Sep 2013 #1

"A minimum of 3x10-4 times present levels." greiner3 Sep 2013 #3

It's thought that the first life didn't need any oxygen muriel_volestrangler Sep 2013 #4

None at all, for some kinds of life Posteritatis Sep 2013 #5