Can you 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 make the modern world work. Could there be life on Mars? Why is north-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.