How sharks survived the ‘Great Dying’

By leaving their coastal homes, some sharks survived an event that caused mass extinctions of other species

By Janet Raloff, 17:57 PM November 1, 2013

Ancient, small sharks survived an event that killed off most large ocean species 250 million years ago. Called the Great Dying, this era marked the end of the Permian Period and the beginning of the Triassic. (That Triassic Period is when dinosaurs would eventually emerge.) The survivor sharks did eventually die out, but not until at least 120 million years after the Great Dying. Where their fossils showed up points to how the mini sharks were able to hold on for so long: They hid out.

The Gre...

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