Take a journey back in time to explore the early ancestors of today’s most familiar mammals. From tiny proto-elephants to ...

I wasn’t yet three. She knew that she was jeopardizing her marriage. She knew that she was crossing a line my dad considered ...

In many mammals, the process that makes an embryo develop as male is triggered by a gene called SRY on the male Y chromosome. However, the SRY gene in monotremes has never been found.

Laura Spinney’s “Proto: How One Ancient Language Went Global” explores the roots of language and how it spread and changed across time and place.

Both are small, sleek mammals with pointy faces, ringed tails, and a knack for staying out of sight. They’re nocturnal, agile, and often spotted near human settlements or forest trails.

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.

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Lethal algae bloom is over, but sickened marine mammals aren’t safe yet. An aerial view of surfers waiting for a set at Dog Beach in Huntington Beach. (Allen J. Schaben / Los Angeles Times) ...

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

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

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.