Physics is the oldest and deepest of all the sciences, revealing profound truths about the way in which the Universe operates. Schrödinger's Cat, the Higgs boson particle, string theory--concepts we've all heard of, but how far do we really understand them? Physics Squared guides you through these topics and more. It may have taken us many centuries to realise it, but physical principles underpin all of the other sciences and much of modern technology, making an understanding of basic physics invaluable.