The fossil of a 125-million-year-old Cretaceous Period mammal, Spinolestes xenarthrosus, was discovered near Cuenca, Spain.Reuters Scurrying under the feet of dinosaurs in swampy terrain in Spain ...

Mammals' best hope for survival through Earth's Pangea Ultima era could look something like the North African gerbil, he said — a small rodent that thrives in the harsh conditions of the Sahara ...

Scurrying under the feet of dinosaurs in swampy terrain in Spain around 125 million years ago was a furry chipmunk-sized critter with tiny hedgehog-like spines, horny body armor and an unpleasant ...

A 125-million-year-old fossil from the early Cretaceous shows the skeletons of a smaller mammal biting a larger horned dinosaur, suggesting a much more complex ancient food web.

The genomes of monkeys, bats, whales and many other mammals are helping scientists tackle big questions about physiology, evolution and one very famous sled dog. An African savanna elephant, an ...