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

A crocodile's tongue is attached to the roof of its mouth and he cannot move it. 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

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

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

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

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

Women blink nearly twice as much as men. See more