This book is an ideal guide to the most important and, of course, the most fascinating questions of modern physics: "Are time travel possible?," "Are there parallel universes?," "If the universe expands, then where does it expand?," "What happens if, having accelerated to the speed of light, look at yourself in the mirror?," "Why do we need particle colliders, and why should they work constantly? Don't they repeat the same experiments endlessly?" Humor, paradox, fascination and accessibility of presentation put this book on the same shelf with the bestsellers of J. Perelman, S. Hawking, B. Bryson and B. Green. A real gift for everyone who is interested in modern science - from an inquisitive high school student to his favorite teacher, from a philologist student to a doctor of physical and mathematical sciences.