How Chewing Shaped Human Evolution - The New York Times
An experiment revealed that chomping on slightly tougher material requires markedly more energy. Spending less time on mastication may go hand in hand with human evolution.
Because chewing tougher food or in this case, tougher gum takes significantly more energy, these findings suggest that the metabolic costs of chewing may have played an important role in our evolutio… [+1283 chars]
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