Some wild animals that seem “too heavy” are doing just fine.

Tipsy zebra finches slur their songs and high spiders spin asymmetrical webs.

And babies, and stuffed animals …

A mysterious wildcat in Sri Lanka may hold a clue.

Even wild animals’ skin can burn, if they’re living in unusual conditions.

Are we trying to save animals in the wrong places?

No one is tracking the total number of animals used across U.S. labs.

Bighorn sheep and moose learn to migrate from one another. When they die, that generational know-how is not easily replaced.