Ancient Romans at one time used human urine as an ingredient in their toothpaste.
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Pierre Jaquet-Droz, a watchmaker, 240 years ago invented a robot that could write, and the parts could be interchanged to say whatever you want.
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A WW2 observation pilot, bored of not being in combat, decided to strap 6 bazookas to his plane. He destroyed several enemy tanks and vehicles. His name was Lt. Col. Charles Carpenter, aka Bazooka Charlie / The Mad Major.
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Grenades were invented in China over 1,000 years ago.
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English sailors were referred to as "limeys" because sailors added lime juice to their diet to combat scurvy.
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Leonardo da Vinci could write with one hand and draw with the other at the same time.
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A monk had once written over a book that contained information about calculus that was written by Archimedes in ancient Greece that could have made us 100 or even 1000 years more mathematically and technologically advanced.
13