Humans reached the Moon less than 70 years after powered flight.

The human heart pumps blood through the circulatory system.

Fact #99 · Human Body

The Earth's axis is tilted about 23.5 degrees.

Fact #256 · Human Body

The Thirty Years’ War affected much of Central Europe.

Fact #1171 · Human Body

Fossils form when organisms are preserved in sediment over millions of years.

Fact #678 · Human Body

Your brain uses patterns to recognize faces almost instantly.

Fact #1760 · Human Body

Some birds have hollow bones to reduce body weight for flight.

Fact #889 · Human Body

The vaccination syringe improved medical delivery methods.

Fact #1576 · Human Body

The human body produces heat through metabolism.

Fact #116 · Human Body