Garlic's distinctive smell is produced only when cells are damaged — it's a defense chemical called allicin.

The dragonfish has bioluminescent organs along its body.

Fact #1404 · Human Body

Some insects have compound eyes made of many lenses.

Fact #513 · Human Body

Your brain predicts events before you consciously experience them.

Fact #1742 · Human Body

The Earth's inner core is primarily iron and nickel.

Fact #150 · Human Body

The Olympic Games are held every four years.

Fact #923 · Human Body

The saber-toothed cat went extinct around 10,000 years ago.

Fact #715 · Human Body

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

Fact #619 · Human Body

Saber-toothed cats had elongated canine teeth.

Fact #674 · Human Body