Big Questions: Physics

The Big Questions series is designed to let renowned experts address the 20 most fundamental and frequently asked questions of a major branch of science or philosophy. Each 3000-word essay simply and concisely examines a question that has eternally perplexed enquiring minds, and provides answers from history's great thinkers. This ambitious project is a unique distillation of humanity's best ideas. In "Big Physics," Michael Brooks answers the 20 key What is the point of physics? Is everything ultimately random? What is time? Why is there no such thing as a free lunch? What happened to Schrodinger's cat? Can I change the universe with a single glance? Are solids really solid? Which is nature's strongest force? Why does an apple fall? Do we live in a computer simulation? What is light? Is Earth's magnetic shield failing? Am I unique in the universe? Does chaos theory spell disaster? Can we travel through time? Is string theory really about strings? Why does E=mc2? What is the God Particle? Why is there something rather than nothing? What is the ultimate nature of reality?