It is physically impossible to hum while holding your nose closed — try it.

The human heart pumps blood through the circulatory system.

Fact #99 · Human Body

The Thirty Years’ War affected much of Central Europe.

Fact #1171 · Human Body

The human stomach can expand significantly after a large meal.

Fact #101 · Human Body

The first forests appeared during the Devonian period.

Fact #710 · Human Body

The Eiffel Tower was once the tallest man-made structure on Earth.

Fact #1518 · Human Body

The brain named itself.

Fact #1692 · Human Body

There are more possible shuffles of a deck of cards than seconds since Earth formed.

Fact #1675 · Human Body

The learned helplessness theory explains passivity after repeated failure.

Fact #1495 · Human Body