The potato originally comes from the Andean Mountains of South America.

A potato is about 80 per cent water.

Potatoes were the first food grown in space!

And the only food not to be rationed during World War Two.

Mr Potato Head was the first toy to be advertised on television, in 1952.

Children in Bolivia, with a new friend! Potatoes make up 80 per cent of their diet - an organisation Christian Aid works with has now given this family some worms to help make better compost that will improve their potato crop

The Scots refused to eat them because they were not mentioned in the Bible.

Marie Antoinette paraded through the French countryside wearing potato blossoms in her hair. Potatoes were said to become fashionable soon after this.

The Aymara Indians, who lived in South America, invented freeze-dried potatoes, or chuño, which you can find in Walter's photo story. Chuno are still made in the same way as they were in the times of the Incas.

The potatoes are spread on the ground on frosty nights. During the day they are covered with straw to protect against the burning rays of the sun. They turn completely white.

After exposure to the frost, woman and children trample on them to get rid of moisture and wear away the peel. Then they are put in a stream of running water for a few weeks in order to wash out the bitter taste. Then they are dried out for two weeks. These potatoes can be stored for up to four years, which is really useful if you can't always grow enough fresh food to eat.