For a better viewing experience, install Brave on your PC, laptop, phone, or tablet.
After installation, open the episode or movie in Brave for more stable playback and fewer interruptions.
Happy watching.
Released
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—from cheetahs to bats to whales to humans—that rule our planet today.
