NOVA

Rise of the Mammals Preview

Preview: Season 46 Episode 17 | 26s Video has closed captioning.

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: 10/30/19

Rating: NR

Problems Playing Video? | Closed Captioning

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