Our kidneys have many tubes; if we would merge them, they would form a long thin tube 65 kilometers long.
Playing chess without looking at the board, was known in Persia and India back in VIII century.
Ancient Greeks often carried their coins in their mouths, because the clothes did not have pockets.
The leader of the Cuban Revolution Fidel Castro was entered in to the Guinness Book of Records as the target of 683 assassination attempts!
Kim Peek (54), the autistic genius who inspired the creation of a film "Rain Man", knew by heart the contents of 12.000 books. That are almost all the books he had read from the age of four.
Sharks will change their sharp triangle teeth (in five rows) continuously throughout their lifetime. They can change up to thirty thousand teeth. It is believed that the bite force of a white shark is equal to three tons.
