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The world's largest desert is Antarctica since a desert is defined as an area receiving less than 250 mm or 10 inches of precipitation per year. The Antarctic desert covers 13.9 million square kilometres, or almost 5.5 million square miles.

However, when most people think of deserts the implied thought is that they are sand based not ice based. It is also not known as the Antarctica Desert because it is not referred to as such in the text books.

The Sahara is the largest hot desert. It is in northern Africa and occupies over a quarter of Africa, covering 9.1 million square kilometres, or 3.5 million square miles. It is generally more recognised as a desert because its rate of evaporation exceeds the rate of precipitation, whereas the Antarctic has a very low evaporation rate.

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Worlds largest desert?

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Egypt has the worlds longest river, the Nile. It also contains part of the Sahara Desert, the world largest desert.


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Antarctica is the world's largest desert located on the continent of the same name.


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