periods of time among the Kalahari Bushmen before Boer and Tswana farmers subjugated and settled them. In 1950, when the Marshall family expedition arrived, the central Kalahari ecosystem was intact. Bushmen were the only humans around, and they had been living much as the Marshalls found them for millennia. For the !Kung Bushmen of the central Kalahari, it could be said that the Paleolithic period did not truly end until about 1965. Thomas was nineteen when she and her family first arrived there and, while her ballerina mother, Lorna Marshall, fashioned herself into a world-class
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