You cannot swallow and breathe at the same time — humans are the only mammals with this limitation.

The Trail of Tears forced Native American tribes westward in the 1830s.

Fact #1129 · Human Body

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

Fact #149 · Human Body

Tyrannosaurus rex had teeth that could grow over 12 inches long.

Fact #619 · Human Body

Bees have five eyes.

Fact #356 · Human Body

The Earth's rotation causes day and night cycles.

Fact #185 · Human Body

Octopuses have three hearts and blue blood.

Fact #1674 · Human Body

Some fish can survive in near-freezing water.

Fact #385 · Human Body

Extreme droughts can last for years.

Fact #832 · Human Body