The heart beats about 100,000 times each day. See more

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

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

Astronauts are not allowed to eat beans before they go into space because passing wind in a spacesuit damages them. 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 is impossible for a solar eclipse to last for more than 7 minutes 58 seconds. See more

It takes a plastic container 50,000 years to start decomposing. See more

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

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