Englishman Roger Bacon invented the magnifying glass in 1250.

The largest ever hailstone weighed over 1kg and fell in Bangladesh in 1986.

The largest desert in the world, the Sahara, is 3,500,000 square miles.

Astronauts cannot belch - there is no gravity to separate liquid from gas in their stomachs.

The Earth is 4.56 billion years old…the same age as the Moon and the Sun.

Micro-organisms have been brought back to life after being frozen in perma-frost for three million years.

A salmon-rich, low cholesterol diet means that Inuits rarely suffer from heart disease.

The earliest wine makers lived in Egypt around 2300 BC.