Hominid Ancestors May Have Knuckle Walked

Science  24 Mar 2000:
Vol. 287, Issue 5461, pp. 2131-2132
DOI: 10.1126/science.287.5461.2131a

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Exactly how our predecessors got around before they walked upright has been a mystery. Now a new analysis of casts of 3-million- to 4-million-year-old hominid bones suggests that humans evolved from an ancestor that walked on its knuckles, like chimpanzees and gorillas. Aside from shedding some light on the murky nature of the common ancestor of humans, chimps, and gorillas, the find helps resolve a conflict between anatomical and molecular evidence linking chimps and humans.