Oysters can change their gender back and forth throughout their lives.

Some fish use tools to crack open shellfish.

Fact #405 · Animals

A polar bear's fur is actually transparent.

Fact #391 · Animals

Blue whales are the largest animals known to have ever lived.

Fact #246 · Animals

Certain frogs use loud calls to attract mates.

Fact #459 · Animals

A hyena’s jaw is powerful enough to crush bone.

Fact #502 · Animals

A wolf's howl can travel several miles.

Fact #427 · Animals

A camel can drink large amounts of water in a short time.

Fact #458 · Animals

Some sharks can sense a drop of blood from far away.

Fact #348 · Animals