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All these ancient skulls have perfectly straight teeth, despite almost certainly never sporting braces. And this isnamp;#39;t some strange sample. ing to the fossil record, ancient humans usually had straight teeth, complete with third molars or wisdom teeth. In fact, the dental dilemmas that fuel the demand for braces and wisdom teeth extractions today appear to be recent developments. So what happened? While its nearly impossible to know for sure, scientists have a hypothesis. A couple million years ago, the ancestors of modern humans lived a subsistence lifestyle. Their teeth and jaws had to work hard to make the food they ate digestible. Indeed, the surfaces of many of their teeth show extensive wear and flattening. They also had larger jaws and teeth overall. At some point, they began using tools and fire to cook and prepare food, which helped break it down. A lot more time passed and, around 12,000 years ago, some humans started farming and domesticating animals and plants. Ov
