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

Our oldest radio broadcasts of the 1930s have already travelled past 100,000 stars.

Alfred Nobel invented dynamite in 1866.

An individual blood cell takes about 60 seconds to make a complete circuit of the body.

If every star in the Milky Way was a grain of salt they would fill an Olympic sized swimming pool.

One million, million, million, million, millionth of a second after the Big Bang the Universe was the size of a …pea.

The world's smallest winged insect, the Tanzanian parasitic wasp, is smaller than the eye of a housefly.

Koalas sleep an average of 22 hours a day, two hours more than the sloth.