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
The flushing toilet was invented in 1596, not by Thomas Crapper as most people think, but by Sir John Harington.
98
There are 92 known cases of nuclear bombs lost at sea.
148
Leonardo da Vinci was dyslexic, and he often wrote backwards.
77
The first telephone book was one page long and had only 50 names in it.
91
Because metal was scarce; the Oscars given out during World War II were made of plaster.
40