In many countries, urine was used as a detergent for washing.
17
On average, 100 people choke to death on ballpoint pens every year.
72
In 1976, an underachieving Princeton junior undergraduate wrote a term paper detailing how to make a nuclear bomb. He got an "A", but never got his paper back because it was seized by the FBI.
16
160 cars can drive side by side on the Monumental Axis in Brazil, the world's widest road.
39
Hong Kong has more Rolls Royces per person than anywhere else in the world.
32
The full moon causes a tidal wave to roll up the Amazon river once in day and once in night for a period of only three weeks in a year. This results in continuous 4m high wave that can be surfed for up to 13km.
14
A man earned 4 million airline miles for free without breaking any laws by using his credit card to purchase free-delivery $1 coins from the U.S. mint.
11