The Sweet Valley High series gave readers a glimpse into serious subjects like love, sex and drugs from the safety of their bedrooms and came with a pair of polar opposite twins that fans could root for -- and identify with -- as they themselves moved through various stages of teen life. Take our quiz to see how much you really know about life in Sweet Valley!
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!