News in Brief Paleontology

Fossil teeth show how a mass extinction scrambled shark evolution

The dinosaur-destroying event flipped which sharks were most dominant in the oceans

lemon shark underwater

SHARK TALE  After a mass extinction event about 66 million years ago, a group of sharks called carcharhiniformes, which includes the lemon shark (shown), became more abundant.

Doug Finney/flickr.com (CC BY-NC 2.0)

By Carolyn Gramling

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