Space and time capture the imagination like no other scientific subject. For good reason. They are form the arena of reality, the very cosmos. Our entire existence-everything we do, think, and experience takes place in some region of space during some interval of time. Yet science is still struggling to understand what space and time actually are. Are they real physical entities or simply useful ideas? If they're real, are they fundamental, or do they emerge from more basic constituents? What does it mean for space to be empty? Does time have a beginning? Does it have an arrow, flowing inexorably from the past to future, as common experience would indicate? Can we manipulate space and time? The Cosmic Journey is intended primarily for the general reader who has little or no formal training in the sciences but whose desire to understand the workings of the universe provides incentive...