If the Sun were the size of a beach ball then Jupiter would be the size of a golf ball and the Earth would be as small as a pea.

Males produce one thousand sperm cells each second - 86 million each day.

In 5 billion years the Sun will run out of fuel and turn into a Red Giant.

When Krakatoa erupted in 1883, its force was so great it could be heard 4,800 kilometres away in Australia.

One in every 2000 babies is born with a tooth.

The thermometer was invented in 1607 by Galileo.

Microbial life can survive on the cooling rods of a nuclear reactor.

The saturn V rocket which carried man to the Moon develops power equivalent to fifty 747 jumbo jets.