So wearing a few thousand dollars worth of orthodontics doesn't make you feel like you have a million dollar smile? Shocker. But maybe whitening your teeth will help build up your confidence until those braces come off? Think again. Unfortunately, that's only going to make things worse. Brush up on whitening while straightening tips and see how well your answers, ahem, align with the truth.
How much do you know about how car engines work? And how much do you know about how the English language works? And what about how guns work? How much do you know? Lucky for you, HowStuffWorks is about more than providing great answers about how the world works. We are also here to bring joy to your day with fun quizzes, compelling photography and fascinating listicles. Some of our content is about how stuff works. Some is about how much you know about how stuff works. And some is just for fun! Because, well, did you know that having fun is an important part of how your brain works? Well, it is! So keep reading!