Paleoanthropologist Zeresenay Alemseged is looking for the roots of humanity in Ethiopia's badlands. Here he talks about what he has found -- including the oldest skeleton yet discovered of a hominid child -- and how Africa holds the clues to what makes us human.
About Zeresenay Alemseged
Zeresenay "Zeray" Alemseged digs in the Ethiopian desert, looking for the earliest signs of humanity. His most exciting find: the 3.3-million-year-old bones of Selam, a 3-year-old hominid child, from the species Australopithecus afarensis.