Science at all times sought to build a complete picture of the world around In recent decades, physicists have come closer than ever to realizing this dream: the prospects of combining the four fundamental interactions of nature within one superpower are emerging, and the physics of the microcosm is increasingly merging with cosmology - the theory of the origin and evolution of the universe. About all this in a popular and fascinating form tells the book of the famous English scientist and popularizer of science Paul Davis (familiar to the Soviet reader on the book "Space and Time in the Modern Picture of the Universe", - M. (The World, 1978). Addressed to all who are interested in the problems of modern fundamental science, especially useful for teachers and students of both physical and philosophical faculties of universities.