The human body generates about 80–100 watts of heat — enough to warm a small room if concentrated.

Polar bears have a thick layer of fat to retain body heat.

Fact #867 · Human Body

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

Fact #889 · Human Body

The Earth's rotation is gradually slowing over time.

Fact #105 · Human Body

Hippopotamuses secrete a reddish fluid that helps protect their skin.

Fact #1246 · Human Body

The human brain contains roughly 86 billion neurons.

Fact #8 · Human Body

Bees have five eyes.

Fact #356 · Human Body

Practice can strengthen neural pathways in the brain.

Fact #968 · Human Body

The use of defibrillators can restore normal heart rhythm.

Fact #1227 · Human Body