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 Questions: Physics, Michael Brooks answers the 20 key questions: 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 Schrödinger'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?