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pondweed with oxygen bubbles

Why is Earth so rich in oxygen? The answer is simpler than we thought

10 December 2019

It took billions of years for Earth’s air to grow rich in oxygen, but it may have been destined to do so once photosynthetic bacteria began pumping out the gas
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

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