Archaeologist: Cattle first kept in Sahara
An archaeologist who has spent decades studying sites in the Sahara says nomads who roamed the area millennia ago were the first to domesticate cattle.
At the time, what is now desert was a vast savannah with a humid climate, Dr. Stefan Kropelin of the University of Cologne told the BBC. When the climate changed and the area became one of the driest places on Earth, its inhabitants moved into the Nile Valley.
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