At over 2000 kilometres long The Great Barrier Reef is the largest living structure on Earth.

The thermometer was invented in 1607 by Galileo.

The grey whale migrates 12,500 miles from the Artic to Mexico and back every year.

The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (metres per second – that is equal to 186,287.49 miles per second).

Christian Barnard performed the first heart transplant in 1967 - the patient lived for 18 days.

Female black widow spiders eat their males after mating.

If you could drive your car straight up you would arrive in space in just over an hour.

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