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Which came first: Complex life or high atmospheric oxygen?

Tags: oxygen

We and all other animals wouldn't be here today if our planet didn't have a lot of Oxygen in its atmosphere and oceans. But how crucial were high oxygen levels to the transition from simple, single-celled life forms to the complexity we see today? By measuring the oxidation of iron in pillow basalts from undersea volcanic eruptions, UC Berkeley scientists have more  precisely dated the oxygenation of the deep ocean, inferring...

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Which came first: Complex life or high atmospheric oxygen?

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