Through Two Doors at OnceBy: Anil Ananthaswamy The clearest, most accessible explanation yet of the amazing world of quantum mechanics. How can matter behave both like a particle and a wave? Does a particle exist before we look at it or does the very act of looking bring it into reality? Is there a place where the quantum world ends and our perceivable world begins? Many of science's greatest minds including Thomas Young, Albert Einstein and Richard Feynman have grappled with