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Enough oxygen on Earth long before animals rose

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Enough oxygen on Earth long before animals rose

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NewsPoster Joined: Mon Aug 30, 2010 9:56 am Posts: 20756	Enough oxygen on Earth long before animals rose Science Daily Geology Oxygen is crucial for the existence of animals on Earth. But, an increase in oxygen did not apparently lead to the rise of the first animals. New research shows that 1.4 billion years ago there was enough oxygen for animals -- and yet over 800 million years went by before the first animals appeared on Earth. Read more
Tue Jan 05, 2016 1:34 pm
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