According to a new study published in the journal PLoS ONE, the relative strength of arms and legs of ‘Lucy’ — a 3.18-million-year-old specimen of Australopithecus afarensis — was in between that of modern chimpanzees and modern humans. A group of Australopithecus afarensis. Image credit: Matheus Vieeira. Early human ancestors are thought to have walked on the ground to some degree, but determining how much — and how well —...
