On the geological timescale, humans’ stay on the planet earth amounts to little more than the blink of an eye. Before we emerged, earlier creatures enjoyed golden ages for more than twice as long as ...

While Thrinaxodon liorhinus didn’t yet have the sophisticated hearing equipment of modern mammals, it shows that eardrums ...

Despite not being particularly mammal-looking, the earliest true mammals began to rise about 200 million years ago, when dinosaurs were still roaming Earth. However, the therapsids still had important ...

Scientists previously thought hopping was impossible for Protemnodon goliah.

One of the defining breakthroughs in mammal evolution was the rise of highly sensitive hearing. Modern mammals rely on a ...

"Prehistoric World" is a new book by Aaron Woodruff, the museum's collection manager for vertebrate paleontology. It includes profiles and illustrations of prehistoric mammals such as Livyatan ...

BOULDER, Colo. — Paleontologists recently discovered a rare mammal fossil in western Colorado. It's a genus of mammal that lived between 70 million and 75 million years ago and has never been seen ...

Therapsids, the ancient relatives of mammals, once roamed Earth in great numbers during the middle to late Permian period. These land-dwelling creatures would later evolve into mammals, but their ...

A new look at a fossil mammal with powerful front legs for digging is clearing up questions about the origin of a group of strange and scaly modern-day creatures called pangolins. First excavated in ...

At first glance, this mammal looks like a horse gone terribly wrong. But, in reality, Chalicotherium is far from a botched ...

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

Discover more about the egg-laying monotremes of Oceania and the ancient traits they still carry.