A lecture he delivered to aspiring doctors at the Philadelphia Association for Medical Instruction outlined the reasons for his cranial compulsion: “I commenced the study of Ethnology ... tied to ...

Perhaps most importantly, Lucy’s discovery foreshadowed a series of fossil finds that filled in the scientific picture of her species. By 1978, enough evidence had accumulated to establish Lucy as the ...

Lucy’s discovery transformed our understanding of human origins. Don Johanson, who unearthed the Australopithecus afarensis ...