Deserts

thumb|upright=1.5|Sand dunes in the [[Rub' al Khali ("Empty quarter") of Arabia]] thumb|upright=1.5|alt=A human with a group of camels in a desert|A camel shepherd near Marrakesh

off-road rally raid

arid climate subtype in the Köppen climate classification system

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processes due to wind activity

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desert surface covered with closely packed, interlocking angular or rounded rock fragments of pebble and cobble size.

rocky planet with very little water

regions of the Earth under an ice cap with very low rainfall and no vegetation; type EF under the Köppen classification

orange-yellow to black coating found on exposed rock surfaces in arid environments

process of man-made reclamation of deserts

type of desert

thumb|Budapest-Bamako Start 2015

ecology of deserts