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Little Foot
The Little Foot skeleton was discovered in the 1990s in a cave in South Africa and is the most intact ancient skeleton of any human ancestor. (Photo/Paul John Myburgh, courtesy of the University of the Witwatersrand, Johannesburg, South Africa)

Analysis of famous fossil helps unlock when humans and apes diverged

The USC-led study examined the shoulder assembly of Little Foot, an Australopithecus that lived more than 3 million years ago, and may have confirmed how our human ancestors used their arms.