Color photography was demonstrated by physicist James Clerk Maxwell in 1861, long before it became practical.

There are unknown phenomena.

Fact #2316 · General

The eruption of Mount Vesuvius buried the city of Pompeii.

Fact #812 · General

Nothing can travel faster than light in a vacuum.

Fact #1901 · General

The inattentional blindness phenomenon can hide obvious stimuli.

Fact #1493 · General

There are mysteries unsolved.

Fact #2310 · General

Ciudad Perdida in Colombia predates Machu Picchu.

Fact #1661 · General

The phalanx formation required coordination and discipline.

Fact #1446 · General

In 1971, a hijacker known as D.B. Cooper parachuted from a plane and was never conclusively identified.

Fact #784 · General