In 1958, a nuclear bomb was lost somewhere along the swampy coast of Georgia. Its whereabouts remain a mystery to this day.
29
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
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
In their early careers, Sylvester Stallone and Jackie Chan both took part in porn.
11