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

Camels have specialized red blood cells that help them survive dehydration.

Fact #856 · Human Body

Learning involves changes in neural connections.

Fact #986 · Human Body

The Earth's inner core is solid despite extreme heat.

Fact #217 · Human Body

The human body produces red blood cells in bone marrow.

Fact #202 · Human Body

Some fish can survive in near-freezing water.

Fact #385 · Human Body

Hippopotamuses secrete a reddish fluid that helps protect their skin.

Fact #1246 · Human Body

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

Fact #86 · Human Body

Some animals can regenerate entire body parts.

Fact #1743 · Human Body