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MOSSEL BAY, SOUTH AFRICA - MAY 26: A view of the sea and rocks from outside a cave called PP13B on May 26, 2010, at Pinnacle Point near Mossel Bay South Africa. The cave sheltered humans between 164,000 and 35,000 years ago, at a time when Homo sapiens was in danger of dying out. These people may have been the ancestors of us. (Photo by Per-Anders Pettersson/Getty Images)