The number 1 was not always considered a prime — mathematicians reclassified it as a unit in the 20th century.

Many coins are made of precious metals such as gold and silver which makes their value higher than face value.

Fact #1672 · Science

Antifreeze proteins allow Antarctic fish to avoid ice crystal formation.

Fact #872 · Science

Certain species of jellyfish can revert to earlier life stages.

Fact #661 · Science

Pterosaurs were flying reptiles, not dinosaurs.

Fact #628 · Science

The Earth's atmosphere contains trace gases like argon.

Fact #288 · Science

The human brain operates on about 20 watts of power.

Fact #1744 · Science

Time moves slower in stronger gravitational fields.

Fact #1755 · Science

The Earth's rotation is responsible for the Coriolis effect.

Fact #261 · Science