Discovered in Hadar, Ethiopia, it brings compelling evidence that this hominid, a species called Australopithecus afarensis, may have been the first human ancestor to walk upright.
Homo erectus, or the first humans to walk upright, lived longer than we previously thought, according to new research. In the 1930s, two lower leg bones and 12 skull caps were discovered in Ngandong, in Java, Indonesia.
