Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...

Find out which animals live the longest and what clues this gives us for potentially slowing down human aging.

Keystone species play an outsized role in the ecosystem, affecting the natural balance in ways that cannot easily be replaced.

Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

From the smallest and fiercest hunters to mighty beasts of land and sea, here are seven predators that routinely take on ...

Anna Champneys does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

From Santa’s reindeer and the Hanukkah armadillo to some very festive sea worms, our changing world is changing life for ...

With copper-blue blood prized by modern medicine and a body plan older than dinosaurs, the horseshoe crab reveals how ancient ...

In a type of relationship known as mutualism, two different species benefit from one another through cooperation. While some ...

There are grunts and growls, knocks and croaks — but the wild sounds detected by a team of British Columbia researchers don't ...

Delaware’s official wildlife animal is not a bird from its coastal marshes or a creature from the Atlantic surf. Instead, it ...