There are so few wild ocelots in the US that the cats are becoming inbred, with a bad prognosis for their ultimate survival. But researchers are perfecting ways to get new genes into the population.

An asteroid that struck Earth 66 million years ago killed nearly all dinosaurs, plants, and animals. So how did some creatures survive the mass extinction?

"We were able to show that the first tusks belonged to animals that came before modern mammals, called dicynodonts," researchers report.

A new study suggests lynxes were in Britain as recently as the 18th century.

Data collected from thousands of hippos helped show that while males are only slightly bigger than females, they have much larger tusks.

The electric Pokemon’s real-life muse is charged with degrading the vast meadows of the Tibetan Plateau.

The electric Pokemon’s real-life muse is charged with degrading the vast meadows of the Tibetan Plateau.

Tracking species over their lifetimes can reveal their climate adaptation secrets.

By measuring how and when elephant seals sleep, researchers were able to figure out how elephant seals change their risk-taking behavior as they gain weight.

Harvard study challenges lateral-to-sagittal shift in mammal spine evolution.