Here's Why Physicists Take the Parallel Worlds Theory Seriously
One thing is for sure: the universe we live in is enormous, with hundreds of billions of galaxies twirling through space in motion. It's simply dizzying to think about the magnitude. This is one of the reasons why the concept of a parallel universe has gained traction, with science fiction, in particular, having a soft place for the idea that we could be living one of an unlimited number of lives. We've seen this concept so many times, from Rick and Morty to Star Trek, that it doesn't feel like a far-fetched possibility for many at this point. Multiverses and parallel worlds are discussed in major scientific concepts such as the Big Bang, string theory, and quantum physics, with scientific theory addressing the case for universes beyond, parallel to, or remote from but mirroring our own.
In this video by the popular science YouTube channel Veritasium, Derek Muller explains why parallel worlds "probably" exist. If you're curious to know more, make sure you watch the video above and as always, enjoy.