Only 1 specimen of this 414-legged creature has ever been found

Antelope Island's famous bison roundup is underway

This is how much invasive brown tree snakes could cost Hawaii

Lion gives sleeping leopard a wake-up call

Hairy Houdinis: 12 animal escape artists

Why are these endangered frogs dying mysteriously in Peru?

Just get in the burrow! Raccoon mom struggles with little ones

Hybrid of extinct aurochs and ice age bison discovered in cave paintings

The story of modern orangutans in 6 arresting photographs

Predator-proof fence saves seabirds in Hawaii

It's a girl! Iowa zoo has a new baby black rhino

Tasmanian devil milk may hold key to killing superbugs