Question

What is the theory of Parallel Universe?​

Answer 1

Explanation:

A parallel universe, also known as an alternate universe or alternative universe, or, alternate or alternative reality, is a hypothetical self-contained plane of existence, co-existing with one's own. The sum of all potential parallel universes that constitute reality is often called a “multiverse".

Answer 2

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A parallel universe, also known as a parallel dimension, alternate universe, or alternate reality, is a hypothetical self-contained plane of existence, co-existing with one's own. The sum of all potential parallel universes that constitute reality is often called a "multiverse".