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The mysterious history of Ksar Draa, the citadel in the middle of the Sahara Desert
Some 700 years ago, an unknown people built a massive citadel in the middle of the Sahara Desert that's known as Ksar Draa. The walls of the citadel, made from sand, straw, and clay, were built to be ...
The Sahara Desert has expanded by approximately ten percent since 1920, according to comprehensive research analyzing rainfall data across Africa from 1920 to 2013. This expansion varies significantly ...
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