Acidic oceans linked to greatest extinction ever

April 9, 2015 6:01 PM

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Acidic oceans linked to greatest extinction ever

Rocks from 252 million years ago suggest that carbon dioxide from volcanoes made sea water lethal.

Earth’s greatest extinction event happened in a one-two punch 252 million years ago. Research now suggests that the second pulse of extinction, during which nearly all marine species vanished from the planet, happened in the wake of huge volcanic eruptions that spewed out carbon dioxide and made the...

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