These essays are little science lessons into fascinating phenomena. They used to be radio shows which means they are engaging and just the right length for snack-sized reading. Ingram goes into the weird habit people have of sticking out their tongue when they are concentrating and explains why wintergreen lifesavers will spark when you crunch them in a darkened room. All the science is easy-to-digest while not dumbed down so that you feel condescended to.