Sahara
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The Sahara is a desert spanning North Africa. With an area of 9,200,000 square kilometres, it is the largest hot desert in the world and the third-largest desert overall, smaller only than the deserts
The Sahara taken by Apollo 17 astronauts, 1972
An oasis in the Ahaggar Mountains
Sand dunes in the Algerian Sahara
Camel train at sunset in the Sahara
African humid period
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The African humid period was a climate period in Africa during the late Pleistocene and Holocene geologic epochs, when North Africa was wetter than it is today. The covering of much of the Sahara by g
Sahara
…Mountains, the Aïr Mountains, the Ténéré desert, and the Libyan Desert. For several hundred thousand years, the Sahara has alternated between desert and savanna grassland in a 20,000-year cycle caused by the precession of Earth's axis (about 26,000 years) as it rotates around the Sun, which changes the location of the…
The modern, arid Sahara. The Sahara was not a desert during the African humid period. Instead, most of North Africa was covered by grass, trees, and lakes.
A present-day savannah, Tarangire National Park, Tanzania
Images of swimming people in the Cave of Swimmers
The Lakes of Ounianga are recharged from fossil groundwater that originated partly during the AHP