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n a find called "momentous," researchers had discovered the first complete skeleton of a human ancestor. Researchers say the latest find is about 3.6 million years old, the oldest hominid skeleton yet discovered anywhere. The 4-foot-tall fossil could find long sought-after clues to human evolution. It was discovered at Sterkfontein on the outskirts of Johannesburg, which was also the site of the discovery of South Africa's first hominid, skull in 1924. Previously, the oldest skeleton was "Lucy," found in Ethiopia and estimated to be 3.2 million years old.