The same asteroid that contributed to extinction of the dinosaurs at the end of the Cretaceous almost wiped out the mammals as well, a new study finds. Their results showed that over 93% became extinct across the K-Pg boundary, but that they also recovered far more quickly than previously thought.

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The same asteroid that contributed to extinction of the dinosaurs at the end of the Cretaceous almost wiped out the mammals as well, a new study finds. Their results showed that over 93% became extinct across the K-Pg boundary, but that they also recovered far more quickly than previously thought.