In 1518, a "dancing plague" struck Strasbourg, Alsace, whereby hundreds of people danced fervently in the streets over the period of a month. Some suffered heart attacks or strokes, and many others died from sheer exhaustion. It remains unexplained.
19
During the Black Plague, it was thought that bad smells were the cause of the plague. "Plague Doctors" therefore wore masks with long beak-like noses stuffed with flowers or smoke to hide the smells.
19
In 1980, the city of Detroit presented Saddam Hussein with a key to the city.
29
Leonardo Da Vinci predicted the mass use of solar energy as long ago as 1447.
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The site where the Parthenon was built had to be cleared of hundreds of dinosaur bones (then called giants' bones) before construction could begin.
13
No one knows who designed the first American Flag.
45
To take an oath, ancient Romans put a hand on their testicles
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