The real name of American film actor Michael Keaton (born 1951) is actually Michael Douglas, but due to the fact that an actor wanted to avoid the name of the older, more famous actor Michael Douglas (born 1944), surname Keaton was chosen in honor of the film actress Diane Keaton.
The longest border in the world is the one that separates Canada and the United States; a length of 6,416 kilometers.
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.
Japan can boast about the oldest anthem on the Earth. Its text is from the 9th century.
First safety belt for car drivers was patented in 1885 in the United States.
Geese were the first birds domesticated by man.
