What does it mean for time to be real? Is time the ultimate stage on which all events play?
Listen to British rocker Jarvis Cocker read the story "Descent of Species" from Sum. He is one of the dozens of terrific voices who read for the audio book.
Wednesday is Indigo Blue: Discovering the Brain of Synesthesia has been awarded the Montaigne Medal, Eric Hoffer Award for Books.
Want to know more about the inner workings of a neuroscience lab? Watch a video profile of David and his students on NOVA Science Now.