Sloths, the world's slowest mammal, have been around for 64 million years. Sharyn Alfonsi traveled to Costa Rica to learn more about how they've survived.

U.S. officials proposed Monday to protect the pangolin, a small, nocturnal mammal covered in scales, under the Endangered Species Act.

The Kaʻohe Game Management Area in Waimea will open to game mammal hunting with a muzzleloader or shotgun (with slug) on July 3. The season will continue through Aug. 31, excluding Aug. 27-28 ...

Civets belong to the family Viverridae, which includes other small, cat-like mammals such as genets and linsangs. Mongooses, on the other hand, are part of the family Herpestidae. While both ...

A tiny jaw fossil in east-central Greenland leads to the discovery of a new mammal-like species, Nujalikodon cassiopeiae, from 200 million years ago.

A tiny jaw fossil in east-central Greenland leads to the discovery of a new mammal-like species, Nujalikodon cassiopeiae, from 200 million years ago.

A tiny jaw fossil in east-central Greenland leads to the discovery of a new mammal-like species, Nujalikodon cassiopeiae, from 200 million years ago.