The female pigeon cannot lay eggs if she is alone. In order for her ovaries to function, she must be able to see another pigeon. See more

Dolphins sleep with one eye open. See more

One quarter of all creatures on the planet are beetles. See more

Shakespeare invented the words "assassination" and "bump". See more

December 1972, astronaut Eugene Cernan (U.S.) became the last person to set foot on the moon. See more

25% of all fires of unknown origin are rat-caused. See more

Al Capone's business card said he was a used furniture dealer. See more

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

It is impossible for a solar eclipse to last for more than 7 minutes 58 seconds. See more