to European Cro-Magnons because of the similarities found between early American hominid tools and Cro-Magnon tools. While this similarity of tools may be well documented in the archaeological record, it is important to remember that a number of environmental (as well as even coincidental) factors can produce similar tools in populations that are widely divergent from each other genetically. Genetic and biological similarities, however, are far less subject to coincidence or misinterpretation. (Greenberg, Turner, & Zegura, 1986, p. 480). (The importance of such studies is not only in their ability to establish links amongst different prehistoric groups of people but also to show how a population that splits fares over time in different environments, (viz. Lukacs, 1996, 152).
Greenberg, Turner and ZeguraÆs model was supported by Powell. Although Powell (1993) found essentially the same results on a macro-level (i.e. that humans must have come to the New World from Asia in three separate waves), his findings are still significant in themselves because of the
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