In this August 2012 photo provided by Marta Mirazon Lahr, researcher Frances Rivera, right, and Michael Emsugut, left, excavate a human skeleton at the site of Nataruk, West Turkana, Kenya. This skeleton was that of a woman, found lying on her back, with lesions on her neck vertebrae consistent with a projectile wound. Photo: AP
In this August 2012 photo provided by Marta Mirazon Lahr, researcher Frances Rivera, right, and Michael Emsugut, left, excavate a human skeleton at the site of Nataruk, West Turkana, Kenya. This skeleton was that of a woman, found lying on her back, with lesions on her neck vertebrae consistent with a projectile wound. Photo: AP