The immortal jellyfish (Turritopsis dohrnii) can reverse its aging cycle and revert to a polyp.

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

Fact #246 · Animals

A hawk has sharp vision adapted for hunting.

Fact #496 · Animals

Crows can recognize individual human faces.

Fact #15 · Animals

Certain frogs can inflate themselves to appear larger to predators.

Fact #377 · Animals

A toucan’s beak is lightweight despite its size.

Fact #526 · Animals

A cheetah can accelerate from 0 to 60 mph in a few seconds.

Fact #363 · Animals

A squid can propel itself rapidly by jetting water.

Fact #417 · Animals

Whales are mammals and must breathe air.

Fact #265 · Animals