What has caused most of the mass extinctions on Earth?
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In the most severe mass extinctions it may take 15 to 30 million years. The worst event, the Permian–Triassic extinction, devastated life on earth, killing over 90% of species.
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In the most severe mass extinctions it may take 15 to 30 million years. The worst event, the Permian–Triassicextinction, devastated life on earth, killing over 90% of species.
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