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accepted Africa American animals apes appear Asia association Australopithecus became become beginning believe belong certainly Chellean civilization claim clearly continent course creature cutting developed differences discovery distinct dogs domestication doubt earlier earliest early Europe European evidence evolution fact factors fossil genus given greater hand-axe culture happened Hominidae Hominoidea Homo human hunting ideas important inferior known later living Lower Lower Miocene major makers material matter means mental Moreover named natural near-man Oldowan Olduvai once origin perhaps period physical Pleistocene Pongidae possible present primate probably problems progress prove qualities races racial rank reached regarded regular pattern relatively remains represented respect result seems selective breeding set and regular simple skull so-called speed stage stone tools suggest super-family superiority taking things true Upper western world monkeys Zinjanthropus
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Olduvai Gorge: Volume 3, Excavations in Beds I and II, 1960-1963
M. D. Leakey
No preview available - 1971