Researchers identified an early mammal ancestor whose eggs may have helped it survive the Great Dying 250 million years ago.

This semi-aquatic mammal may look improbable, but its biology reveals how evolution shapes even the strangest mammal bodies.

In the aftermath of Earth’s most catastrophic extinction event, one unlikely survivor rose to dominate a shattered world: ...

A 250-million-year-old fossil from Africa reveals that early mammal ancestors laid eggs, offering insight into their survival ...

Around 11 million years ago, a cooling climate fragmented warm, humid forests in Africa, Asia, and Europe, giving rise to savannas. Many mammals evolved to take advantage of these wide-open spaces, ...

One of the most important steps in the evolution of modern mammals was the development of highly sensitive hearing. The middle ear of mammals, with an eardrum and several small bones, allows us to ...

The sprawling-upright transition across mammal evolution, showing changes in posture and limb bone shape. The transition from sprawling (reptile-like) to more upright (parasagittal) posture and ...

Mammals, including humans, stand out with their distinctively upright posture, a key trait that fueled their spectacular evolutionary success. Yet, the earliest known ancestors of modern mammals more ...

Reconstruction of a Paleocene mammal that lived around 65 million years ago. Credit: Sarah Shelley The evolution of ankle and foot bones into different shapes and sizes helped mammals adapt and thrive ...

Researchers studying a 250-million-year-old fossil have found the first ever proof that mammal ancestors laid eggs, with the ...