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ferrel_hadley t1_jahpxc5 wrote

Its a science fiction trope. It has no physics to back it up. There is an idea of a "Multiverse" based on weird version of Braine theory. But in each of those the laws of physics are so wildly different to our every day that they have no space or time or so on. It has no meaning for us, and I am suspicious this theory has no actual science to support it.

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ReadditMan t1_jai9znr wrote

Completely agree, I've actually gotten into arguments with people who legitimately believe that parallel universes are real and supported by scientific evidence, and then they cite a bunch of theoretical articles that are only supported by more theories.

There's an entire pseudoscience subculture built around theories like parallel worlds, time travel, higher dimensions, simulation theory, etc. Literally just things that science fiction writers made up from their imaginations but because of decades of pointless theoretical "research" and theories built upon more theories people are now convinced they are real.

The best way to advanced human knowledge and understanding of the universe is to observe and study the universe, pulling a fantastical theory out of nowhere and then spending decades trying to prove its existence is backwards and futile.

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