The rarest element in Earth's crust is Astatine — only about 28 grams exist at any given time.

The human brain operates on about 20 watts of power.

Fact #1765 · Science

Atoms are made of protons, neutrons, and electrons.

Fact #60 · Science

The Cambrian explosion saw rapid diversification of life.

Fact #708 · Science

Fossils form when organisms are preserved in sediment over millions of years.

Fact #678 · Science

Lightning can heat air hotter than the surface of the Sun.

Fact #1807 · Science

There are more possible chess games than atoms.

Fact #1694 · Science

The Harlow monkey experiments studied attachment and maternal bonding.

Fact #996 · Science

The Earth's inner core is solid despite extreme heat.

Fact #217 · Science