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Evidence

  • How do we know these hominids walked upright on two legs?

Many strands of evidence for the australopithecines in general suggest this:

  • the way the skull is balanced on the vertebral column;
  • the structure of the pelvis and femur;
  • the few australopithecine foot bones that have been found;
  • and (most directly) the trails of footprints they occasionally left.