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Atheist Forums › Science › Life Sciences v
How Life Began on Earth

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How Life Began on Earth
TheRealJoeFish Offline
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#5
RE: How Life Began on Earth
January 4, 2016 at 5:21 pm (This post was last modified: January 4, 2016 at 5:22 pm by TheRealJoeFish.)
[Image: 840px-Oxygenation-atm-2.svg.png]

Graphical form of what Anomalocaris said.  From Wikipedia page on "Great Oxygenation Event".  Essentially, life started over 3 billion years ago (maybe 3.5ish?) but O2 certainly wasn't around until 2.5 bya at the earliest, and didn't reach today's levels until relatively recently in the geological timescale

(In the picture the red and green are the upper and lower bounds, respectively, of the estimated oxygen concentration)
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Atheist Forums › Science › Life Sciences v
How Life Began on Earth

Messages In This Thread
How Life Began on Earth - by Rhondazvous - January 4, 2016 at 3:09 pm
RE: How Life Began on Earth - by Kingpin - January 4, 2016 at 3:15 pm
RE: How Life Began on Earth - by vorlon13 - January 4, 2016 at 3:54 pm
RE: How Life Began on Earth - by Anomalocaris - January 4, 2016 at 4:47 pm
RE: How Life Began on Earth - by TheRealJoeFish - January 4, 2016 at 5:21 pm
RE: How Life Began on Earth - by Rhondazvous - January 10, 2016 at 4:10 pm
RE: How Life Began on Earth - by Gawdzilla - January 10, 2016 at 4:53 pm
RE: How Life Began on Earth - by Minimalist - January 10, 2016 at 5:28 pm
RE: How Life Began on Earth - by Gawdzilla - January 10, 2016 at 6:41 pm
RE: How Life Began on Earth - by The Grand Nudger - January 10, 2016 at 5:29 pm
RE: How Life Began on Earth - by Rhondazvous - January 10, 2016 at 6:20 pm
RE: How Life Began on Earth - by The Grand Nudger - January 12, 2016 at 5:31 am

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