The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
16
In 1700s, the deer skin was a common medium of exchange between the trading settlers and the native Red Indians in America. This is how a buck became a slang for a dollar.
28
In 1897, Bayer, who is the maker of Aspirin, marketed the drug heroin.
56
A female photographer in the 50s took tens of thousands of pictures and remained remained unknown until her death. She is now considered one of the most important street photographers ever.
20
Leonardo da Vinci could write with one hand and draw with the other at the same time.
56
Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11
The World Trade Center towers used to have two zip codes, 10047-10048, one for each building.
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