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

Millions of years before the asteroid impact that ended the reign of the dinosaurs, mammals were already beginning to shift ...

The house mouse (Mus musculus) is one of the most common mammals worldwide. It can be found in all parts of the United States ...

The order Cetacea includes marine mammals, such as whales, dolphins, and porpoises. Fossil evidence suggests that the cetaceans share a common ancestor with land-dwelling mammals that began living ...

But marsupials remain much less common than other mammals. Opossums and other marsupials exist in North and South America, but Australia is the only continent where marsupials—and monotremes ...

The planet’s earliest mammals are an important part of our evolutionary history, yet remain shrouded in mystery. One of them, Mixodectes pungens lived in western North America during the early ...

Last common ancestor of all life emerged far earlier than thought The team plans to expand its study by looking at additional early mammal fossils from elsewhere in the world, but Shawkey doesn ...

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