More mammals were living on the ground several million years before the mass extinction event that wiped out the dinosaurs, ...

Professor Janis said, "The vegetational habitat was more important for the course of Cretaceous mammalian evolution than any ...

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.

A small carnivorous vertebrate that lived more than 200 million years ago in the region that is now South America is helping researchers understand life on Earth before dinosaurs. This fossil is ...

Some 40 million years before the dinosaurs dominated Earth ... reveal the creature as a powerful hunter with an important life history, offering clues about the common ancestors of a variety ...