The concept of musical octaves — frequencies doubling — is found independently in almost every musical tradition.

Quantum particles can influence each other instantly across distance.

Fact #1843 · Science

The development of anesthesia made complex surgery possible.

Fact #1190 · Science

Nothing can travel faster than light in a vacuum.

Fact #1777 · Science

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

Fact #678 · Science

Antiretroviral therapy transformed HIV from fatal to manageable.

Fact #1208 · Science

The first reptiles evolved from amphibian-like ancestors.

Fact #706 · Science

Time moves slower in stronger gravitational fields.

Fact #1794 · Science

The Earth's atmosphere becomes colder in the stratosphere before warming again.

Fact #227 · Science