As for the disparity in skull features, a number of factors, including diet and random genetic drift, could account for differences in appearance between modern Native Americans and Kennewick Man. (discovermagazine.com)
Despite the age and unprecedented completeness of the new ape skull, no reported tooth or skull features clearly place N. alesi close to the origins of living apes and humans, says paleoanthropologist David Begun of the University of Toronto. (sciencenews.org)
Unique skull feature may have enabled communication at frequencies too low for predators to hear (sciencemag.org)