New research from the University of Bristol provides evidence that many mammals were already shifting toward a more ground-based lifestyle leading up to the end-Cretaceous mass extinction that wiped out non-avian dinosaurs 66 million years ago. Dryolestes, a Late Jurassic relative of Cretaceous therian mammals. Image credit: James Brown / Pamela Gill / University of Bristol. Present-day mammals mostly live in diverse habitats dominated by flowering...
