Drones (UAVs) were originally developed for military reconnaissance in the 1910s.

The camera allowed images to be captured and preserved.

Fact #1556 · Technology

Kevlar, used in bulletproof vests, was invented accidentally by Stephanie Kwolek at DuPont in 1965.

Fact #4396 · Technology

The Three Gorges Dam is one of the largest hydroelectric dams in the world.

Fact #1511 · Technology

The printing of newspapers increased public access to information.

Fact #1575 · Technology

The development of laparoscopic surgery reduced recovery time.

Fact #1222 · Technology

The Hoover Dam generates hydroelectric power for millions of people.

Fact #1509 · Technology

A fuel cell converts chemical energy directly into electricity with higher efficiency than combustion engines.

Fact #4716 · Technology

Morse code was originally developed for electric telegraphs, not radio.

Fact #3922 · Technology