Give a brief description of sahara desert long answer
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The great desert was born some 7 million years ago, as remnants of a vast sea called Tethys closed up. The movement of tectonic plates that created the Mediterranean Sea and the Alps also sparked the drying of the Sahara some 7 million years ago, according to the latest computer simulations of Earth's ancient climate.
New research describes the ancient Trans-Saharan Seaway of Africa that existed 50 to 100 million years ago in the region of the current Sahara Desert. ... The region now holding the Sahara Desert was once underwater, in striking contrast to the present-day arid environment.
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