Why there are so many different languages for humans? Scientific American says, the way we eat can actually alter jaw anatomy. And the consequences can alter the way we speak. Our upper and lower teeth aligned to form a flat line, the top ones resting directly on the bottom set. Tooth wear brought about by chewing hard foods, such as un-milled grains or seeds, the reduced challenge of consuming soft foods such as porridge and cheese, and other personal preferences in food could have been the culprits.
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