How can a cat be alive and dead at the same time? How was Higgs' 'God Particle' finally identified? Do big objects fall faster than smaller ones? These and other questions are answered inside this definitive guide to the groundbreaking experiments and scientists that have shaped the discipline of physics since 430 B.C.E. Whether the topic is gravity or the speed of light, radioactivity or general relativity, you'll be intrigued and inspired by this journey through history and into the workings of the physical world.