Which 1958 invention can be used to repair a broken taillight, reassemble a vase, close wounds, and lift fingerprints? How fast (in milliseconds) does a batter have to react in order to hit a fastball hurtling in at 90 mph?  What's the easiest way to demagnetize a screwdriver? Test your grasp of scientific trivia with this handy pocket-sized book, complied by the editors of Popular Mechanics. It's chock-full of brainteasers, multiple-choice questions, and amazing facts on cars, home how-to, nature, sports, science and technology, and much more.