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prompter
What is the largest desert in the world?
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d1089a7a-cbd9-4651-8530-e0a93df898c4
assistant
The Antarctic Polar Desert would be the largest.
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3c47c867-7c4a-43ac-8b88-efaffa1344d1
prompter
How big is it in size?
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595298e9-0dfb-483e-b732-ed649b9b3e59
assistant
It's area is estimated to be 13.8 Million square kilometers.  It is equivalent to a circle with a radius of 2100km. 

This ranks it among the largest land structures on earth. Comparable entities are:
* ~0.8 x of the total area of Russia
* ~1.4 x of the total area of Canada