Lucy

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The skeletons of Lucy (left) and Kadanuumuu (right). Both belong to the early human species Australopithecus afarensis. (Images not to scale.) I never fully appreciated how small Lucy was until I saw her bones for myself. Photographs and restorations of her and her kin within the species Australopithecus afarensis had never really given me a…

A comparison of three-dimensional scans of hominin footprints. Top) A footprint made by an experimental subject using a normal, “extended” gait. Middle) A footprint made by an experimental subject using a “bent-knee, bent-hip” gait. Bottom) A Laetoli footprints. From Raichlen et al., 2010. About 3.6 million years ago, at a spot now in Laetoli, Tanzania,…