Traumatic brain injury is one of the strongest risk factors for Alzheimer's disease later in life.

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

Fact #1672 · Science

Sound travels faster in solids than in air.

Fact #54 · Science

Archaeopteryx shows characteristics of both dinosaurs and birds.

Fact #681 · Science

Particles can exist in multiple states until observed.

Fact #1770 · Science

The Michelson-Morley experiment influenced Einstein's theory of relativity.

Fact #1034 · Science

The fossil record is incomplete but still informative.

Fact #743 · Science

The Müller-Lyer illusion makes lines of equal length appear different.

Fact #1464 · Science

Fossilized pollen helps scientists understand ancient ecosystems.

Fact #722 · Science