Where is the driest place on earth?
Antarctica. Parts of the continent have seen no rain for two million years. A desert is technically defined as a place that receives less than 254 mm (10 inches) of rain a year. The Sahara gets just 25 mm (1 inch) of rain a year. Antarctica’s average annual rainfall is about the same, but 2 per cent of it, known as the Dry Valleys, is free of ice and snow and it never rains there at all. The next-driest place in the world is the Atacama Desert in Chile. In some areas, no rain has fallen there for 400 years and its average annual rainfall is a tiny 0.1 mm (0.004 inches). Taken as a whole, this makes it the world’s driest desert, 250 times as dry as the Sahara. As well as the driest place on earth, Antarctica can also claim to be the wettest and the windiest. Seventy per cent of the world’s fresh water is found there in the form of ice, and its wind speeds are the fastest ever recorded. The unique conditions in the Dry Valleys of Antarctica are caused by so-called katabatic winds (from t...