What's the News: Parents going broke to pay for their offspring's braces and orthodontistry can finally blame somebody besides their mildly malformed children: our farmer ancestors. A study published this week in the Proceedings of the National Academy of Sciences found that people living in subsistence farming communities around the world have shorter, wider jaws than those in hunting and gathering societies. This leaves less room for teeth, which have changed little in size or abundance over human history—and may help explain why crooked choppers and a need for orthodontia are so common, study author Noreen von Cramon-Taubadel tells the BBC. "I have had four of my pre-molars pulled and that is the only reason that my teeth fit in my mouth," she says. How the Heck:
von Cramon-Taubadel, a University of Kent anthropologist, made 3-D images of 322 craniums and 295 mandibles from 11 groups of subsistence tribes around ...
