Entropy always increases in a closed system — this is the second law of thermodynamics.

Time moves slower in stronger gravitational fields.

Fact #1755 · Science

The Earth's mantle is composed of semi-solid rock.

Fact #329 · Science

Rats have demonstrated empathy in laboratory studies.

Fact #1308 · Science

The Stroop effect demonstrates how conflicting information can slow reaction time.

Fact #1463 · Science

The Earth's atmosphere contains trace amounts of carbon dioxide.

Fact #196 · Science

Nothing can travel faster than light in a vacuum.

Fact #1732 · Science

Practice can strengthen neural pathways in the brain.

Fact #968 · Science

The largest dinosaurs were plant-eating sauropods.

Fact #685 · Science