Learn more about the mammalian transition from arboreal to terrestrial life, which began millions of years before the arrival of the asteroid that devastated the dinosaurs. Learn more about the mammalian transition from arboreal to terrestrial life, which began millions of years before the arrival of the asteroid that devastated the dinosaurs. The Sciences All Articles | Discover Magazine
When the Dinos Died, Mammals Were Already Adopting Terrestrial Lifestyles
