Brian Green, one of the leading physicists of our time, the author of “The Elegant Universe”, invites us on another amazing journey into the depths of the universe, which will help us look at the reality around us from a completely different perspective. The book examines fundamental issues related to classical physics, quantum mechanics and cosmology. What is space? Why does time have direction? Is it possible to travel into the past? What role do symmetry and entropy play in the evolution of the cosmos? What's behind dark matter? Can the Universe exist without space and time? Green examines in detail Newton's picture of the world, Mach's ideas, Einstein's theory of relativity and analyzes its contradictions with quantum mechanics. The book discusses the problems of decoherence and teleportation in quantum mechanics. Many moments of the inflationary model of the Universe, the first fractions of a second after the Big Bang, the horizon problem, and the formation of galaxies are analyzed. Much attention is paid to a new modern approach to explaining the picture of the world using string theory/M-theory. Green shows that our world is very different from what common sense has taught us. The author takes us all, regardless of the level of education and scientific training, on an educational journey to new layers of reality that modern physics reveals under the layer of the world we are familiar with.