The microwave was invented after a researcher walked by a radar tube and a chocolate bar melted in his pocket.
Video recording machine invention
The video recording machine was invented by the Ampex corporation of California in 1956. The first video recorder, the Ampex VR1000, stood 1,1 m (3 ft 3 in) high and weighed as much as a small car: 665 kg (1,466 lb).
More Inventions Facts
Bullet proof vests, fire escapes, windshield wipers and laser printers were all invented by women.
Grenades were invented in China over 1,000 years ago.