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Oxygen may have helped complex life arise a billion years early

Oxygen may have helped complex life arise a billion years early

23 April 2018

Earth’s air suddenly got a lot more oxygen around 1.6 billion years ago and that could have triggered the evolution of large multicellular organisms
Hot springs, Yellowstone National Park

Ancient microbes caused Earth’s first ever global warming

11 December 2017

Over 3 billion years ago, the sun was faint so our planet should have been a snowball. But it wasn’t – and microorganisms may have been what kept it warm

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