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Rise of the Mammals

Season 46 Episode 17

About the Episode

Sixty-six million years ago, an asteroid wiped out the dinosaurs in a fiery global catastrophe. But we know little about how their successors, the mammals, recovered and took over the world. Now, hidden inside ordinary-looking rocks, an astonishing trove of fossils reveals a dramatic new picture of how rat-sized creatures ballooned in size and began to evolve into the vast array of species.

Aired: 10/29/19 | Expires: 12/31/24 | Runtime: 53m 27s
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