The skulls of Australian aborigines have characteristics not found in any other race, No one knows for how long the different races have been evolving independently, but it might be necessary to go back one million years or more to find an ancestor common to all races Clearly, a great deal of divergence has taken place during that timeWith a longer, thinner bonyWhite Americans' heads are getting bigger literally, study shows If someone complains that a person has a big head, it's normally considered a dig at the enormity of that person's ego But
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