You’ve probably whipped out a fun fact or some trivia on Thanksgiving to steer everyone away from more incendiary topics. Getting up early on Christmas can make your loved ones just as cranky as ...

What information do we collect from this quiz? Dr Chris and Dr Xand find out where your adult teeth come from and compare what happens to them when you don't brush.

A more credible hypothesis posits that he had a "blue" tooth. In the context of Old Norse, "blue" could have meant dark or black, implying he might have had a discolored or decayed tooth.