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Early Life Was Pumping out Oxygen, but the Earth's Mantle Was Absorbing It | Universe Today
The Great Oxidation Event took place 2.4 billion years ago. That's when photosynthetic bacteria flooded the atmosphere with oxygen, banishing early, non-oxygen using lifeforms to the fringes of the Earth. But photosynthetic bacteria were pumping out oxygen long before the event. Where did all the oxygen go? A new study examined that question. Shintaro Kadoya, a postdoctoral scholar in Earth and space sciences at the UW, and David Catling, professor of Earth and space sciences at the UW, are quoted.
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