CO₂ concentrations in Earth's atmosphere have not been this high in at least 3 million years.

The Earth's core generates geothermal heat.

Fact #293 · Science

There are more possible chess games than atoms.

Fact #1694 · Science

In 1938, Otto Hahn's work led to the discovery of nuclear fission.

Fact #1015 · Science

The Late Cretaceous period featured diverse dinosaur species.

Fact #720 · Science

Pterosaurs were flying reptiles, not dinosaurs.

Fact #628 · Science

Time moves more slowly in stronger gravitational fields.

Fact #1618 · Science

Archaeopteryx is considered a transitional fossil between dinosaurs and birds.

Fact #624 · Science

The human brain operates on about 20 watts of power.

Fact #1744 · Science