South Africa Deputy President Cyril Ramaphosa, left, shakes hand whislt introduced to Steven Tucker, right, by Lee Berger, a professor at the University of the Witwatersrand, center, at the Maropeng Cradle of Humankind in Magaliesburg, South Africa, Thursday, Sept. 10, 2015. It was the night of Sept. 13, 2013, and Tucker and his caving partner had just discovered the remains of what scientists would determine to be a new member of the human family tree. (AP Photo/Themba Hadebe)
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