Mysteries of quantum mechanics

Imagine a world where nothing exists until it interacts with something else; a world of ghost waves and cats that are both asleep and awake. That’s the spooky world of quantum, the hundred year old theory that has practical applications in everyday life yet remains an enigma for most of us. Carlo Rovelli and Richard Staley join Ed Kessler to lift the lid on the box with Schrodinger's cat inside...