We hope that the lack of formulas in the book will not discourage potential readers. Sean Carroll, a theoretical physicist and one of the world's most famous science popularizers, makes us look at physics in a new way. Facing the central mystery of quantum mechanics will completely change our understanding of space and time. Most physicists are unaware of the unpleasant fact: their beloved science has been in crisis since 1927. There have been glaring gaps in quantum mechanics from the very beginning that were simply ignored. Popularizers constantly insist that quantum mechanics is something strange, inaccessible to understanding... For everything to fall into place, it is enough to admit that we exist in more than one copy in the Universe. There are an infinite number of Sean Carrolls. Like each of us. Thousands of times per second, more and more copies of us appear in the Universe. Every time a quantum event occurs, the world is duplicated, creating a copy in which the quantum event never happened. There is nothing mystical or inexplicable about quantum mechanics. It's just physics. The publishing design is preserved in PDF A4 format.