Book excerpt: Can you really lose weight by consuming nothing but ice cream and beer? How does the latest blockbuster movie get squeezed onto a disk, and how do they make the pictures seem 3D? How much does a selfie weigh? What's the science behind forensic investigations, body scans, and the dating of ancient artefacts? The Physics Behind... takes the reader on a fascinating journey through the scientific principles that that make the modern world work. Could there be life on Mars? Why is north really south? How do self-driving cars find their way around? These and many more topics are explored by starting with the basic science that makes them tick - examining the physics behind them. Packed with detailed original artwork and infographics, The Physics Behind... is perfect for anyone who has ever been curious about the science of life. Including: - The physics behind modern life: Wi-Fi, Facial recognition, touchscreens, microwave ovens, the ice cream and beer diet, taking a selfie, Flash memory, a bag of sugar, catching the train, calendars and clocks - The physics behind entertainment: optical discs, lasers, white water, executive toys, the electric guitar, music, 3D movies - The physics behind analysis: medical imaging, looking at little things, spectroscopy, crime scene investigation, tricorder, microfluidics, radiocarbon dating, proving the Earth is round - The physics behind space: rocket science, space weather, Planet Nine, space telescopes, is there anybody out there? life on Earth, life on Mars - The physics behind big science: what's the matter?, time travel, bomb or meltdown?, the Large Hadron Collider, the Human Genome Project, the Standard Model, gravity, everything - The physics behind the weird universe: strings, rings and other things, N-dimensional space, the hypercube, antimatter, the dark universe, quantum weirdness, quantum biology, time crystals and Majorana - The physics behind the environment: weather forecasts, climate change, renewable energy, migration, peacock feathers, sunburn, rainbows, spider silk - The physics behind transportation: autonomous autos, Hyperloop, Maglev, satellite navigation, motor sport, going rreeaallllyy fast, stealth - The physics behind everything else: curve balls, the Mpemba Effect, why north is really south, perpetual motion and the heat death of the universe, and the physics behind this book.