Like fingerprints, everyone's tongue print is different. See more

The telescope on Mount Palomar, California, can see a distance of 7,038,835,200,000,000 million miles. See more

Venus is the only planet in the solar system to spin backwards. See more

We lose half a litre of water a day through breathing. See more

10% of human dry weight comes from bacteria. See more

Hot water weighs less than cold water for a given volume. See more

Zero point energy is a source of energy which is released when atoms stop moving, at -273 Celcius. See more

We know more about the surface of the moon than we do about the bottom of the ocean. See more

Lightning strikes about 6,000 times per minute on this planet. See more