1.75 -2.0 MYA. The Dmanisi Homo erectus (ergaster) was discovered in 1999 by Abesalom Vekua, et al. in Dmanisi, Georgia. Our cast comprises the D2700 cranium and D2735 jaw. This small-brained specimen, found alongside Oldowan-like choppers and scrapers, undercuts the theory that hominids did not leave Africa until about one million years ago and only after becoming large-brained bipeds with well-developed tool-making abilities.