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Reptiles rapidly invaded the seas soon after a global extinction wiped out most life on Earth, according to a new study. Global climate change - likely triggered by massive volcanic eruptions - killed off more than 95 percent of all species about 250 million years ago, at the end of the Permian period. Land reptiles colonized the ocean in just 3.35 million years at the beginning of the Triassic, a speedy recovery in geologic time. [Source: University of California, Davis]
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