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PARALLEL UNIVERSE THEORY, OR MANY WORLDS THEORY
Speaking of parallel universes, you might be living in one universe and copies of you in other universes.
Physicists have hypothesized that the existence of parallel universes would explain a number of observed phenomena in quantum mechanics and cosmology that otherwise don’t make horse sense.
One of the best known and respected hypotheses is that of the American physicist Hugh Everett and others. According to the “many-worlds” or “multiverse” interpretation of quantum mechanics, there are many copies of you, each existing in a separate parallel universe. However, a phenomenon known as “quantum decoherence” prevents you from communicating with your other selves. (Dang!)
Mathematically, Everett’s theory respects scientific determinism (important in formulating theories in physics), and also does not require the acceptance of hidden variables, a weakness of other interpretations of observed phenomena in quantum mechanics.