How did the Sahara Desert get so dry?

How did the Sahara Desert get so dry? College Station, Texas (UPI) Nov 30, 2016 - Some 6,000 years ago, the Sahara Desert was regularly drowned by tropical rains. It wasn't a desert at all, but vast grasslands. Today, the Sahara features some of driest acreage on Earth. Recently, a pair of researchers from Texas A&M University and Yale University set out to explain how such a vast climatic transformation can happen in such a short amount of time. In order to do so, t ... more

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