Your senses are limited.

The human nose can distinguish thousands of different scents.

Fact #107 · Human Body

The human body is about 60% water.

Fact #45 · Human Body

The left lung is slightly smaller than the right to make room for the heart.

Fact #3629 · Human Body

Teeth are the only part of the human body that cannot repair themselves.

Fact #3509 · Human Body

Goosebumps are a vestigial reflex — in our hairier ancestors, they made fur stand up to appear larger or stay warm.

Fact #3505 · Human Body

Blood makes up about 7% of a person's body weight.

Fact #3506 · Human Body

The human brain contains billions of neurons involved in thinking.

Fact #2983 · Human Body

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

Fact #2608 · Human Body