An exploration of mankind’s fascination with worlds beyond our own—by the bestselling author of The Physics of Star TrekLawrence Krauss—an international leader in physics and cosmology—examines our long and ardent romance with parallel universes, veiled dimensions, and regions of being that may extend tantalizingly beyond the limits of our perception. Krauss examines popular culture’s current embrace (and frequent misunderstanding) of such topics as black holes, life in other dimensions, strings, and some of the more extraordinary new theories that propose the existence of vast extra dimensions alongside our own.