This intriguing book delves into twenty of the most fascinating, far-reaching, and timely questions in popular science. Three experienced science writers go in pursuit of the answers for anyone who has ever wondered who we are, why we are here, and what "here" actually is. Some of the questions, such as "What is consciousness?" and "What makes us human?" are eternal. Others, such as "Are there other universes?" and "What's at the core of a black hole?" take readers into other dimensions. All of them speak to our sense of wonder and the desire to know more.