Humans are bioluminescent — they emit faint light, most intensely around 10 AM.

The human body can survive hours in freezing water in rare cases.

Fact #3073 · Human Body

The cornea of the eye has no blood vessels — it gets oxygen directly from the air.

Fact #3497 · Human Body

The small intestine is about 20 feet long despite being called 'small' — the name refers to its width.

Fact #3499 · Human Body

The human nervous system can send signals at over 200 miles per hour.

Fact #2642 · Human Body

Your brain enables thought.

Fact #2405 · Human Body

The human circulatory system is more than 60,000 miles long.

Fact #2608 · Human Body

Your small intestine is about 20 feet long — about four times your height.

Fact #3278 · Human Body

The human brain weighs about three pounds on average.

Fact #244 · Human Body