For the past 65 million years, mammals have thrived across nearly every corner of Earth. In this time span, they have shaped ...

Mammal bones, especially skulls ... Despite these differences, all mammals share four traits that are shown in the diagram below: hair, mammary glands, a hinged jaw, and three tiny middle ear ...

They acquired certain traits that would characterize mammals ever afterward: limbs positioned under the body, an enlarged brain, a more complex physiology, milk-producing glands, and a diverse ...

Inside a metal vault here in rural Vietnam is a creature believed to be the most trafficked mammal in the world. No sounds come from its cage. No squeaks or howls. A padlocked door creaks open to ...

A replica fossil of the titanosaur _Patagotitan_, one of the largest dinosaurs ever discovered. It would have weighed about 70 tons (63.5 metric tons.) Spencer Platt/Getty Images News via Getty Images ...

Learn how one company’s effort to bring back the Ice Age creature from extinction takes a key first step.

Dos Rios takes in 1,600 acres where the Tuolumne and San Joaquin rivers meet. It was restored over about a decade starting in ...

If a puma, a Ginkgo tree, and a narwhal all step into a ring, who’s winning the fight? March Mammal Madness comes as close as one can to answering this question; though the annual event doesn’t ...

The secret to titanosaurs’ remarkable biological success may be how they merged the best of both reptile and mammal characteristics to form a unique way of life. Titanosaurs originated by the Early ...