Sixty-six million years ago, an asteroid slammed into Earth, bringing the dinosaurs’ reign to a fiery end. But from this catastrophe, tiny mammal survivors were able to emerge from the shadows and flourish. Today we live in the age of mammals, with a staggering array of species, from lions to bats to whales, occupying nearly every habitat on Earth. But how did our predecessors evolve so rapidly and diversify into the range of creatures we know today?
