Remarkable fossils capture mammals’ recovery after the dino-killing asteroid
Survivors grew from the size of a rat to that of a wolf within 700,000 years of the impact
![mammal skulls](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/10/102319_jp_mammal-rebound_feat.jpg?fit=1028%2C579&ssl=1)
Scientists have found 40 mammal skulls (a selection shown) so far at Corral Bluffs, a fossil site in Colorado that’s helping reveal how mammals thrived after an asteroid strike 66 million years ago.
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