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FILE--Dr. Mary Leakey, right, and her husband Louis Leakey excavate bits of bone and tools of prehistoric man at Olduvai Gorge in Tanganyika, Tanzania, in 1961. Mary Leakey died Monday, Dec. 9, 1996, her son said in a statement. She was 83. The Leakeys astounded the world with their fossil discoveries in Tanzania and Kenya that indicated man was far older than previously had been believed. (AP Photo/copyright National Geographic Society, Robert F. Sisson)