At least our one "local" universe (quantum theory suggest an infinite number of them), the big bang theory is stil being debated. Sam neil hosts this doc with decent production value. worrrd.
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The multiverse (or meta-universe (metaverse)) is the hypothetical set of multiple possible universes (including our universe) that together comprise all of reality. The different universes within the multiverse are sometimes called parallel universes. The structure of the multiverse, the nature of each universe within it and the relationship between the various constituent universes, depend on the specific multiverse hypothesis considered.
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