Young jumping spiders dangle by a thread through the night, in a box, in a lab. Every so often, their legs curl and their spinnerets twitch—and the retinas of their eyes, visible through their ...

Discover the fascinating world of camouflage and masterful mimicry in this gallery of hidden animals. From elusive snow leopards to tiny mantises, these animals of all shapes and sizes can blend ...

Tens of millions of farm animals cross state lines every year, traveling in cramped, stressful conditions that can facilitate the spread of disease. By Emily Anthes and Linda Qiu The bird flu virus ...