As recently as 5,000 years ago, the Sahara was not a desert, but green. Dramatic changes can arise from even gradual planetary shifts. First the change comes slowly, then fast, in just a few hundred years.— Nicholas A. Christakis (@NAChristakis) September 2, 2019
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Friday, September 6, 2019
The Sahara Desert was created by humans 5000 years ago
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