Wednesday, November 30, 2019, 9:00-10:00 p.m.

Sixty-sixmillion years ago, anasteroid wiped out the dinosaurs in a fiery global catastrophe. But we know littleabout how their successors, the mammals, recovered and took over the world. Now, hidden inside ordinary-looking rocks, an astonishing trove of fossils revealsa dramatic new picture of how rat-sized creaturesballooned in size and began toevolveinto the vastarray of species—from cheetahs to bats to whales to humans—that rule our planet today.