The brain can predict the future by continuously modeling the world and comparing expectations to reality.

The heart pumps blood through approximately 60,000 miles of blood vessels.

Fact #165 · Human Body

The human eye has a natural blind spot.

Fact #126 · Human Body

The human brain contains roughly 86 billion neurons.

Fact #8 · Human Body

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

Fact #1390 · Human Body

The Earth's inner core is primarily iron and nickel.

Fact #150 · Human Body

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

Fact #1675 · Human Body

The fangtooth fish has some of the largest teeth relative to body size in the ocean.

Fact #1392 · Human Body

Extreme droughts can last for years.

Fact #832 · Human Body