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
Until President Kennedy was killed, it wasn't a federal crime to assassinate the President.
341
Clocks made before 1660 had only one hand - an hour hand.
41
The life expectancy in 1900 was just 47 years.
49
Pilgrims did not eat with forks. They only used spoons, knives and their fingers.
44
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21


