The world's largest hot desert spans 10 countries across north Africa, covering a phenomenal 9,400,000 km2 (3,629,360 sq mi) - about the size of China. It is made up of ergs (areas of sand dunes), hamada (rocky plateau), and wadi (dry valleys). Its waterways run only intermittently, bar the Nile in Egypt. Its people are of various origins: they include Berbers in Morocco, Nubians, and Sahrawis in Mauritania.
Much of the Sahara, across Libya, Algeria and Egypt, is off-limits to tourists at present (see the Foreign Office website for the latest advice), but camel caravans take visitors into the dunes from Merzouga and Zagora, for nights under the clear skies, which often blossom with stars.
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Credit: AP
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