The holes in Swiss cheese are called 'eyes' — cheese without holes is called 'blind'.

Your stomach replaces itself every few days.

Fact #1696 · Human Body

Rats can learn complex maze patterns quickly.

Fact #1333 · Human Body

In 1809, two countries declared war and then forgot to sign a peace treaty for years.

Fact #805 · Human Body

Some animals can regenerate entire body parts.

Fact #1740 · Human Body

The human body contains trillions of cells.

Fact #142 · Human Body

Certain parrots can learn to mimic human speech.

Fact #1258 · Human Body

The human stomach can expand significantly after a large meal.

Fact #101 · Human Body

The axolotl can regenerate limbs and even parts of its heart.

Fact #366 · Human Body