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Paleontological evidence suggests a

Paleontological evidence suggests a - clearly must be based...

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Paleontological evidence suggests a single origin in Africa . Molecular data shows low genetic diversity worldwide with the highest diversity in Africa, aslo suggsting an African origin. Recent re-analyses shown that the cladograms of mtDNA cannot support an African origin on statistical grounds. Moreover, some recent fossil finds have put humans outside Africa about 2.4 MYBP, but these may be due to early migrations. However, three independent, recent articles in Nature (March 31, 1994; vol. 368, pgs. 449-457) all support an African origin for humans; two are based on fossil analyses and one is based on DNA analyses of microsatellites (next lecture). The analysis of the evolution of culture and civilization in humans
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Unformatted text preview: clearly must be based in materials other than human bones alone. The evolution of tools is one reliable correlate (they are recognizable as being rocks reworked as tools and, being rocks, they preserve well). The patterns of tool form show some suggestive trends regarding civilization: through time more types of tools become apparent and there is less variation among specimens in the shape/form of a given tool (see figure). This has been interpreted as evidence for communication or "training", since 'word may have spread' on just how to improve that stone ax so that it can be used more effectively for certain tasks....
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