Red blood cells can travel through your entire body in about 20 seconds.

Border collies can learn hundreds of word-object associations.

Fact #1303 · Human Body

The human brain operates on about 20 watts of power.

Fact #1744 · Human Body

Tyrannosaurus rex had teeth that could grow over 12 inches long.

Fact #619 · Human Body

The primacy effect describes better recall of early information in a sequence.

Fact #1477 · Human Body

The barreleye fish has a transparent head and upward-facing eyes.

Fact #1390 · Human Body

The Earth is not perfectly round.

Fact #1719 · Human Body

Grizzly bears can run at speeds over 30 miles per hour.

Fact #1260 · Human Body

Hippopotamuses secrete a reddish fluid that helps protect their skin.

Fact #1246 · Human Body