1974
On a survey in Ethiopia, in 1974, paleoanthropologist Donald Johanson, AM’70, PhD’74, discovered “Lucy,” a 3.2 million-year-old bipedal hominin skeleton that was 40 percent intact. Classified in 1978 as the first known member of Australopithecus afarensis, Lucy is a direct ancestor of the modern human. The discovery changed our understanding of human evolution.