This book is science fiction, but it is not fiction. It is a popular science book, but most of the scientific ideas and achievements it popularizes are fiction. The book is written in the not yet existing genre of science fiction popularization. She talks about science emerging before our eyes. A science about which physicists argue and have not yet come to a common opinion. This science is called upon to answer the fundamental questions of existence. Are we living in the best of all possible worlds? Are there other worlds besides ours? In 2057, it will be one hundred years since the publication of an article by American physicist Hugh Everett, which caused controversy that continues to this day. On the centennial anniversary of Everett's pioneering work, the book you hold in your hands will be published. This is a fantasy, because science may not develop as written here. This is a popular science book of the future, because science can develop as it is written here. While reading this book, remember that Jules Verne’s science fiction novel “Robourg the Conqueror” caused considerable controversy in its time, because the generally accepted opinion was: Heavier-than-air vehicles will never be able to fly. Less than a quarter of a century has passed - the Wright brothers' plane took off...