The pufferfish inflates by swallowing water, not air — its spines are modified scales.

The pacemaker regulates irregular heartbeats.

Fact #1581 · Human Body

Some insects have compound eyes made of many lenses.

Fact #513 · Human Body

Curiosity can enhance learning and memory retention.

Fact #973 · Human Body

The average adult human has 32 teeth.

Fact #152 · Human Body

Insulin was first used to treat diabetes in the early 1920s.

Fact #1189 · Human Body

Some animals can regenerate entire body parts.

Fact #1743 · Human Body

The Thirty Years’ War affected much of Central Europe.

Fact #1171 · Human Body

Pandas have a specialized wrist bone that functions like a thumb.

Fact #1237 · Human Body