Dogs can detect cancer, diabetes, and seizures through smell — with remarkable accuracy.

A tarantula can survive for weeks without food.

Fact #353 · Animals

Some species of sharks must keep moving to breathe.

Fact #284 · Animals

A porcupine raises quills as a defense mechanism.

Fact #524 · Animals

A sea lion can hold its breath for several minutes underwater.

Fact #400 · Animals

Some sharks detect electrical signals from other animals.

Fact #128 · Animals

A zebra’s stripes may help confuse predators.

Fact #500 · Animals

Some fish use tools to crack open shellfish.

Fact #405 · Animals

Some species of snakes give live birth instead of laying eggs.

Fact #540 · Animals