Most of the atoms in your body are empty space.

Volcanic eruptions can produce lightning within ash clouds.

Fact #844 · Science

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

Fact #1189 · Science

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

Fact #1034 · Science

The Earth's interior is layered into crust, mantle, and core.

Fact #338 · Science

Fossilized footprints provide evidence of dinosaur behavior.

Fact #688 · Science

Nothing can travel faster than light in a vacuum.

Fact #1732 · Science

The Hawthorne experiments studied workplace productivity.

Fact #1011 · Science

Nothing can travel faster than light in a vacuum.

Fact #1834 · Science