Eagles mate while airborne. See more

Elephants are the only animals that can't jump. See more

You can't kill yourself by holding your breath. See more

A flea can jump 350 times its own body length. See more

A mole can dig about 92 metres in 1 night. See more

The strongest muscle in the body is the tongue. See more

A giraffe can clean its ears with its 21-inch tongue. See more

Adolf Hitler had only one testicle. See more

A boeing 747's wingspan is longer than the Wright brothers' first flight (120 feet/36 meters). See more

Members of the armed forces and the police cannot vote in the Dominican Republic. See more

If you take a pencil, you can draw a 50 kilometer (31 mile) long line. See more

Eels have two hearts. See more

The most common name in the world is Mohammed. See more

There are more than 40,000 characters in Chinese script. See more

28% of Africa is wilderness. See more

Everyone is colourblind at birth. See more