When Edwin Hubble looked into his telescope in the 1920s, he found that nearly all of the galaxies he could see were flying away from one another, suggesting they had at one time all been in the same place—a key piece of evidence pointing to how the universe began. Here the executive editor of New Scientist explores everything from the Big Bang and dark energy to dinosaurs, cities, timekeeping, and belly-button fluff. In six sections—the universe, our planet, life, civilization, knowledge, and inventions—Graham Lawton answers a series of big questions about the past, present, and future of everything.