There is no universal present moment across the universe.

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

Fact #1189 · Science

The Müller-Lyer illusion makes lines of equal length appear different.

Fact #1464 · Science

Nothing can travel faster than light in a vacuum.

Fact #1834 · Science

Dark matter is believed to make up most of the universe’s mass but has not been directly observed.

Fact #1594 · Science

X-rays were discovered in 1895 and transformed medical imaging.

Fact #1194 · Science

The discovery of anesthesia allowed painless surgical procedures.

Fact #1230 · Science

Positive reinforcement can strengthen certain behaviors.

Fact #964 · Science

The Earth's rotation is responsible for the Coriolis effect.

Fact #261 · Science