The deepest drilling into Earth reached only about 0.2% of the distance to the center.

Water covers more than 70% of Earth's surface.

Fact #86 · Human Body

An adult giraffe can clean its ears with its tongue.

Fact #248 · Human Body

The first successful heart transplant was performed in 1967.

Fact #1014 · Human Body

The McGurk effect shows how visual cues can alter what we hear.

Fact #1472 · Human Body

Hyenas have powerful jaws adapted for crushing bone.

Fact #1274 · Human Body

Rats can learn complex maze patterns quickly.

Fact #1333 · Human Body

The human skeleton is made up of over 200 bones in adulthood.

Fact #34 · Human Body

Giraffes have high blood pressure to pump blood to their brains.

Fact #1250 · Human Body