Before we tell you what the world's
longest desert is, it is important to define a desert.
A desert is a region that receives less than 250 mm or
10 inches of average annual precipitation.
Now that that's out of the way the world's longest desert is the continent of
Antarctica which receives, on average, 2 inches of precipitation per year.
At it's longest length Antarctica is almost 6,000 kilometers and it
covers about 14 million sq km.
Antarctica also has the longest desert coastline stretching 17,968
If you're wondering about the longest 'hot' desert, then the answer is the
The Sahara desert is between 1,200 and 2,000 kilometers north to south and is at
about 5,000 kilometers long from east to west and covers about 9 million sq km.
For comparison, temperatures in the Sahara have reached 134 degrees
Fahrenheit while in Antarctica they have dipped as low as -128 degrees Fahrenheit
for a 262 degree spread.
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