The Sistine Chapel ceiling took Michelangelo about 4 years to paint — largely on scaffolding, not lying down.

The Earth spins at 1000 mph.

Fact #1704 · Human Body

Certain fish can inflate their bodies to appear larger.

Fact #554 · Human Body

Many insects have exoskeletons that protect them from dehydration.

Fact #876 · Human Body

A rhinoceros has thick skin for protection.

Fact #504 · Human Body

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

Fact #889 · Human Body

Your brain predicts events before you consciously experience them.

Fact #1742 · Human Body

The human eye can distinguish millions of colors.

Fact #74 · Human Body

Fingernails grow faster than toenails.

Fact #110 · Human Body