Before an asteroid wiped out the dinosaurs, Earth experienced a short burst of intense volcanism

December 12, 2014 12:16 PM

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1 hour ago by Jennifer Chu

Sixty-six million years ago, an asteroid more than five miles wide smashed into the Earth at 70,000 miles per hour, instantly vaporizing upon impact. The strike obliterated most terrestrial life, including the dinosaurs, in a geological instant: Heavy dust blocked out the sun, setting off a cataclys...

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