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

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 ...

The deer mouse, believed to be the most common mammal in North America, has a very different take on family values than its ...

But under the surface they have more in common than it may first seem. There are thought to be over 5,400 species of mammals living on Earth. They come in all shapes and sizes - from tiny mice to ...

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