Researchers prove humans lived in once-fertile Kalahari Desert - studyResearchers from the University of Cape Town, South Africa, found evidence that contradicts the hypothesis that humans only lived in the region during wetter periods.Kalahari Desert(photo credit: HP. BAUMELER/CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)/VIA WIKIMEDIA COMMONS)