Census Of Modern Organisms Reveals Echo Of Ancient Mass Extinction

Paleontologists can still hear the echo of the death knell that drove the dinosaurs and many other organisms to extinction following an asteroid collision at the end of the Cretaceous Period 65 million years ago. "The evolutionary legacy of the end-Cretaceous extinction is very much with us. In fact, it can be seen in virtually every marine community, every lagoon, every continental shelf in the world," said University of Chicago paleontologist David Jablonski.

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