Dinosaurs are great. They dominated the world for over 170 million years, and one line has survived to the present day as birds. But they’re hardly the be-all and end-all of prehistory. In the wake of the mass extinction that wiped out the non-avian dinosaurs, prehistoric mammals proliferated into a variety of astounding forms that were just as fantastic as those of the dinosaurs they succeeded. Instead of letting them be persistently overshadowed by dinosaurs, it’s time to give fossil mammals their due.