It takes 8 minutes 17 seconds for light to travel from the Sun's surface to the Earth.

The tallest tree ever was an Australian eucalyptus - In 1872 it was measured at 435 feet tall.

The Universe contains over 100 billion galaxies.

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

Wilhelm Rontgen won the first Nobel Prize for physics for discovering X-rays in 1895.

One in every 2000 babies is born with a tooth.

In the 14th century the Black Death killed 75,000,000 people. It was carried by fleas on the black rat.

The wingspan of a Boeing 747 is longer than the Wright brother's first flight.