Polar bears have hollow, transparent hairs — not white — which channel sunlight to their black skin.

The platypus is one of the few mammals that lay eggs.

Fact #382 · Animals

A walrus uses its tusks to haul itself onto ice.

Fact #536 · Animals

Some species of octopus can escape through very small openings.

Fact #451 · Animals

A sea star can regrow lost arms.

Fact #425 · Animals

A grizzly bear can run surprisingly fast over short distances.

Fact #492 · Animals

Many birds use Earth's magnetic field for navigation.

Fact #388 · Animals

Some insects have compound eyes made of many lenses.

Fact #513 · Animals

A blue-ringed octopus carries venom potent enough to affect humans.

Fact #370 · Animals