[QUOTE][B]). So did australopithecines like Lucy walk upright? Careful study of the skeletal anatomy of australopithecine fossils indicates a stooped gait, probably similar to the ‘rolling’ knuckle-walk of chimps. Doesn't sound humane to me[/QUOTE]
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Web sites I've checked indicate that Australopithecines have foramen magnums in the base of the skull. This means that they would have had to walk upright in order to look forward (knuckle-walker FM's are in the rear of the skull). If the creature were to crawl on its knuckles it would have been very awkward because it would have had to stare at the ground all of the time.
http://www.geocities.com/palaeoanthropology/Aafricanus.html