2+2 is 4

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

Fact #1189 · Science

Fossils are formed when remains are preserved in rock over millions of years.

Fact #631 · Science

Learning involves changes in neural connections.

Fact #986 · Science

The use of antibiotics reduced deaths from bacterial infections.

Fact #1220 · Science

Some earthquakes are too small to be felt but are detected by instruments.

Fact #828 · Science

The Cavendish experiment measured the density of the Earth using lead spheres.

Fact #994 · Science

Some prehistoric creatures were larger than modern equivalents.

Fact #733 · Science

Particles can exist in multiple states until observed.

Fact #1817 · Science