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

Rain falls at 11 km/h. See more

More than 50% of the people in the world have never made or received a telephone call. See more

Hydrogen is an explosive gas. Oxygen supports combustion. Yet when these are combined it is water which is used to put out fires. See more

It takes 8 minutes for sunlight to travel from the sun to the earth. See more

Every 5 seconds a computer gets infected with a virus. See more

You cannot sneeze with your eyes open. See more

Your skin weighs about 3.2 kg. See more

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