Saber-toothed cats had elongated canine teeth.

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

Fact #400 · Animals

Some species of bats use echolocation to hunt in darkness.

Fact #390 · Animals

A hummingbird's heart can beat over 1,000 times per minute.

Fact #345 · Animals

A hippopotamus can hold its breath underwater for several minutes.

Fact #433 · Animals

A crocodile’s teeth are replaced throughout its lifetime.

Fact #532 · Animals

Certain fish change sex during their lifetime.

Fact #503 · Animals

Sea otters use rocks as tools to break open shellfish.

Fact #43 · Animals

A king cobra can raise a third of its body off the ground.

Fact #421 · Animals