Although we don't quite often bother to find out how the microwave oven in the kitchen works or the automatic transmission gearbox in your car works, the human brain is designed to be very inquisitive and tries to dig down deep to find out how it works, either out of necessity or sheer fun. HowStuffWorks is one such website created by Marshall Brain to explain the way many things work and make the task simpler. The website has answers to questions like "How Tattoos Work" and "How Space Shuttles Work".