Ancient humans didn’t need braces. So why do we?

SD: Yeah, and so here’s the twist. For most of human history, people didn’t need braces. AC: Which is wild. SD: So wild. It’s ...
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Once considered "uncool," braces are now a hot trend

OK, let's face it. Braces get a bad rap in pop culture. (SOUNDBITE OF TV SHOW, "THE SIMPSONS") HANK AZARIA: (As Dr. Wolfe) I'm also afraid little Lisa is going to need braces. YEARDLEY SMITH: (As Lisa ...