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New Evidence Is Challenging What We Know About the Deadliest Mass Extinction in History

The extinction at the end of the Permian period 252 million years ago was one of the darkest chapters in the history of life. Up to 96% of all marine species and 70% of terrestrial life forms vanished in a geologic blink.


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The dinosaurs might have been killed off by more than one asteroid [Mad Geology]

The theory that a giant asteroid impact killed the dinosaurs 65 million years ago gained acceptance when we discovered the gigantic Chicxulub crater. Now we've found the crater of another asteroid that struck Earth at almost the exact same time. More »

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