The four fundamental forces are gravity, electromagnetism, and the strong and weak nuclear forces.

The Earth's outer core is liquid metal.

Fact #250 · Science

Sound travels faster in solids than in air.

Fact #54 · Science

The human brain operates on about 20 watts of power.

Fact #1765 · Science

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

Fact #261 · Science

Insulin was first used to treat diabetes in the early 1920s.

Fact #1189 · Science

Energy and mass are interchangeable.

Fact #1762 · Science

Time moves slower in gravity.

Fact #1721 · Science

The Earth's atmosphere blocks much of the Sun's harmful radiation.

Fact #113 · Science