Evolutionary Back Story: Thoroughly modern spine supported human ancestor Bruce Bower Bones from a spinal column discovered at a nearly 1.8-million-year-old site in central Asia support the controversial possibility that ancient human ancestors spoke to one another. WIDE OPEN. A recently discovered Homo erectus vertebra from central Asia (left) displays a larger spinal cord canal than does a corresponding bone (right) from a skeleton that had been found in Kenya. Meyer Excavations in 2005 at Dmanisi, Georgia, yielded five vertebrae from a Homo erectus individual, says anthropologist Marc R. Meyer of the University of Pennsylvania in Philadelphia. The finds occurred...