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Asteroids and comets pummeling Earth delayed rise of oxygen

October 25, 2021
Asteroids and comets pummeling Earth delayed rise of oxygen
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Remnants of ancient asteroids revealed Earth was bombarded by massive space rocks more often than previously thought, vastly altering oxygen levels in the planet's early atmosphere.



October 25, 2021 at 04:00PM
via Space.com read more...

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