Recreating the musculature of the leg and pelvis, the imagery supports the supposition that this part-time tree-dwelling hominin walked completely erect, like humans, but more than three million years earlier.Starting with human MRI and CT scans to map muscle pathways, Wiseman next focused on virtual reconstructions of Lucy's bones and joints, and then married up cues from muscle "scarring" on the bones.The resulting model shows how Lucy was capable of upright, erect locomotion but also possessed powerful leg muscles that facilitated her species' half-land, half-arboreal lifestyle. Researchers believe the extra muscle power in the legs – 74% of the total...