Intelligent people have more zinc and copper in their hair. See more

A day on the planet Mercury is twice as long as its year. See more

A chicken who just lost its head can run the length of a football field before dropping dead. See more

All the chemicals in the human body have a combined value of approximately £4.00. See more

Two-thirds of the world's executions occur in China. See more

On average, Americans spend about 6 months of their lives waiting in front of traffic lights. See more

Albert Einstein's parents were worried he was mentally slow, because it took him a long time to learn how to speak. See more

Humans, bonobo monkeys, and dolphins are the only species that have sex for pleasure. See more

In Tibet it is considered good manners to stick out your tongue at someone. See more

Former enemies, America and Russia now have a great deal in common - they both lead the world in locking people up. See more

Banging your head against a wall uses 150 calories an hour. See more

Icthyomaniacs are people who are crazy about fish. See more

To "testify" was based on men in the Roman court swearing to a statement made by swearing on their testicles. See more

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

Those stars and colours you see when you rub your eyes are called phosphenes. See more

When baby sharks are born, they swim away from their mothers right away and are on there own. In fact, their mothers might see them as prey. See more