Time passes faster the farther you are from Earth's surface.

Water is the only natural substance that commonly exists as a solid, liquid, and gas on Earth.

Fact #175 · Human Body

Your brain uses patterns to recognize faces almost instantly.

Fact #1752 · Human Body

The first forests appeared during the Devonian period.

Fact #710 · Human Body

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

Fact #86 · Human Body

The human heart pumps blood through the circulatory system.

Fact #99 · Human Body

In 1920, a town in Minnesota briefly elected a bear as mayor in a publicity stunt.

Fact #773 · Human Body

The Earth's mantle is composed of semi-solid rock.

Fact #329 · Human Body

The Arctic hare has short ears to minimize heat loss.

Fact #885 · Human Body