Scientists Explain Why Modern Humans Have Chins

April 16, 2015 10:04 AM

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Chins of anatomically modern humans don’t come from mechanical forces such as chewing, but instead result from an evolutionary adaptation involving face size and shape, according to a team of anthropologists at the University of Iowa.

Using facial and cranial biomechanical analyses with nearly 40 people whose measurements were plotted from toddlers to adults, the Iowa University team concludes mechanical forces, including chewing, appear incapable of producing the resistance needed for new bone to be created in the lower mandible...

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