Octopuses have three hearts, nine brains, and blue blood.

Some birds can navigate using the position of the stars.

Fact #235 · Animals

A lion’s mane can signal strength and health.

Fact #460 · Animals

Some birds can sleep while flying.

Fact #332 · Animals

A horned lizard can squirt blood from its eyes as a defense.

Fact #538 · Animals

Some birds use tools to extract insects from wood.

Fact #416 · Animals

Dolphins use echolocation to navigate and hunt underwater.

Fact #12 · Animals

A chimpanzee can use tools to solve problems.

Fact #508 · Animals

Some amphibians can absorb oxygen through their skin.

Fact #328 · Animals