Earth’s ‘Great Oxidation Event’ spanned 200 million years, according to recent geochemical findings

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Continue ReadingEarth’s ‘Great Oxidation Event’ spanned 200 million years, according to recent geochemical findings

Astrophysicists estimate the probability that Earth was exposed to cold and harsh interstellar clouds 2 million years ago

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Continue ReadingAstrophysicists estimate the probability that Earth was exposed to cold and harsh interstellar clouds 2 million years ago