In this groundbreaking book, world-renowned astrophysicist Neil deGrasse Tyson tackles the world's thorniest philosophical conundrums, armed with wit, wisdom, and cutting-edge science. Together with distinguished physicist James Trefil, Tyson presents questions that have preoccupied humanity for millennia. Then, using the latest theories, from the Big Bang to string theory and the multiverse, he explores the answers, bolstered with stunning images and the latest insights from missions to planets, moon, asteroids, and beyond.