In this photo taken Oct. 2, 2013, ancient skulls and jaws of pre-human ancestors are displayed at the Georgia National Museum in Tbilisi, Georgia. The discovery of an estimated 1.8-million-year-old ... more 
In this photo taken Oct. 2, 2013, ancient skulls and jaws of pre-human ancestors are displayed at the Georgia National Museum in Tbilisi, Georgia. The discovery of an estimated 1.8-million-year-old skull of a human ancestor found below Dmanisi, a medieval Georgian village, captures early human evolution on the move in a vivid snapshot and indicates our family tree may have fewer branches than originally thought, scientists say. It is the earliest evidence of human ancestors moving out of Africa and spreading north to the rest of the world. (AP Photo/Shakh Aivazov) less 
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Associated Press | Photo By Shakh Aivazov
Thu, Oct 17, 2013 2:38 PM EDT