Giant insects of the Carboniferous period, like 1-meter dragonflies, existed because oxygen levels were higher.

The earliest dinosaurs were relatively small.

Fact #731 · Science

Sound travels faster in solids than in air.

Fact #54 · Science

The Ames room illusion distorts perceived size and distance.

Fact #1490 · Science

Light travels at approximately 299,792,458 meters per second in a vacuum.

Fact #21 · Science

Quantum particles can influence each other instantly across distance.

Fact #1843 · Science

Vaccines train the immune system to recognize pathogens.

Fact #64 · Science

Time moves slower in stronger gravitational fields.

Fact #1794 · Science

In 1954, a scientist allowed himself to be bitten by mosquitoes to study malaria transmission.

Fact #997 · Science