A desert is a landscape or region that receives almost no precipitation – the average annual precipitation must be less than 250 millimetres (10 in) per year, or is an area where more water is lost by evapotranspiration than falls as precipitation. Because Antarctica is a “polar” region, there is no precipitation, it has no lakes or rivers. It is in fact the driest continent. The interior of Antarctica is considered the world’s driest desert because the extreme cold freezes water vapour out of the air. Less than 5 cm of rain falls on the polar plateau each year.
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