What Physical World do We Live in?

It is shown that the hypothesis of the Monoverse corresponding to the existing version of the special theory of relativity is erroneous. The existing version of the special theory of relativity itself is also erroneous. A revised version of it is presented, the relativistic formulas of which allowed creating a hypothesis of the hidden Multiverse. The hypothesis of the hidden Multiverse is based on the general scientific principle of the physical reality of imaginary numbers proved by the author. It is shown that this hypothesis, in contrast to numerous other hypotheses of the Multiverse and the hypothesis of the Monoverse, is already verifiable. And the experimental proof of the reality of the existence of the hidden Multiverse is the phenomenon of dark matter and dark energy. Other experimental evidence is also proposed. As a result of processing the data obtained by the WMAP and Planck spacecraft, the structure of the hidden Multiverse, which turned out to be quaternion, was determined, and its parameters were determined. According to these calculations, the hidden Multiverse contains from twenty to twenty-two parallel universes, of which five to six neighboring universes create the phenomenon of dark matter, and the rest of the parallel universes create the phenomenon of dark energy. In addition, it has been shown that our hidden Multiverse is adjacent to other Multiverses, which are inaccessible to our observations not only by electromagnetic, but also by gravitational manifestations, with which in aggregate it forms the Hyperverse.