How often are you exposed to second-hand smoke
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Explanation:
Agriculture changed not only human culture and life ways, but human biology as well. Agriculture diets may have resulted in a less robust craniofacial morphology in early farmers. However, obtaining reliable estimates of world wide subsistence effects has proved challenging. Here, we quantify changes in human skull shape and from across the agricultural transition at a global scale. Although modest, the effects are often reliably directional and most pronounced in craniofacial features that are directly involved in mastication. However,the essential units of morphology are shape, form, size and not pair wise distances. The beauty of statistical shape analysis is its potential to quantify and concretely represent morphological differences in morphological units. The loss of this potential when evaluating directional effects (diets, climate, etc) in distance unit.
