Alternative realities

Physicists and philosophers have long debated the meaning of quantum theory, but one way or another, they agree that it reveals a vast world beyond our perception. The Many-Worlds Interpretation is one of the popular hypotheses in physics and philosophy.
The Many-Worlds Interpretation (MWI), or the Everett interpretation, is an interpretation of quantum mechanics that posits the existence, in a certain sense, of "parallel universes." In each of these universes, the same laws of nature and the same physical constants apply, but they exist in different states.
The original formulation belongs to physicist Hugh Everett (1957). Hugh Everett suggested that when a quantum measurement is performed, the wave function does not "collapse" to a single outcome but realizes all possible outcomes of the transformation into a particle. In this process, the Universe "branches": as many "versions" of it are created as there are possible measurement results.
It follows that there are countless parallel universes where all possible quantum probabilities are realized. Everything that can happen, does happen somewhere in the boundless set of universes, and the probabilities of quantum theory represent the relative number of universes in which one or another course of events occurs.
The Multiverse, or metaverse, or hyperverse, is the hypothetical set of all possible, really existing parallel universes (including the one we are in). The universes comprising the Multiverse are called alternative universes, alternative realities, parallel universes, or parallel worlds. Various hypotheses about the existence of a multiverse have been proposed by cosmologists, physicists, philosophers, religious figures, and science fiction writers.
In the Multiverse, there is everything, everywhere, all at once. In the Multiverse, there is no past and future—they are simply alternative versions of the present.
Other times are merely a special class of parallel universes.
Consequently, any event that does not violate the laws of physics happens eternally in some version of a universe.