The Graecopithecus femur from Azmaka, Bulgaria, (a) in comparison with that of Lucy, Australopithecus afarensis, (b) and the thighbone of a chimpanzee (c). The femoral neck (indicated in red) is longer and more upward pointing in the human ancestors Graecopithecus and Australopithecus than in the chimpanzee (photo: Nikolai Spassov et al, “An early form of terrestrial hominine bipedalism in the Late Miocene of Bulgaria” in Palaeobiodiversity and Palaeoenvironments, March 4, 2026)
‘Could be the oldest known human’: 7.2-million-year-old femur suggests early bipedalism in Europe #UofT 🦴 uoft.me/cjA