A Desert Is Defined by Low Rainfall, Not Heat
Regions that receive less than about 250 millimeters of precipitation a year count as deserts.
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Camels Store Fat in Their Humps, Not Water
The fat is an energy reserve that lets them go long periods without food.
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Some Deserts Are Very Cold
The Gobi's winter temperatures can drop to around minus 40 degrees Celsius.
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The Atacama Is One of the Driest Places on Earth
Some weather stations there have never recorded rain.