00556nam a2200085Ia 4500008004100000245005900041300027600100650001300376856008100389170517s9999    xx            000 0 und d  aSearch for the First Human (Sahelanthropus Tchadensis)  aSahelanthropus Tchadensis is one of the oldest known species on the human family tree. This species lived sometime between 7 and 6 million years ago in West-Central Africa (Chad). Walking upright may have helped this species survive in the diverse habitats - including...  xScience.  uhttp://topdocumentaryfilms.com/search-first-human-sahelanthropus-tchadensis/