It comes from quantum mechanics where particles travel all possible routes and when making calculations you need to account for all possible variations, because they affect each other.
When particle is measured, all variations disappear except one and that one continues thereafter without the affects of others.
Multiword model dictates that the other variations don’t disappear. They just disconnect from our reality and continue elsewhere.
Currently multiworld model is popular. Imho it 's the only one that properly explains all quantum phenomena.
Although there is a good argument wether multiworld is proper science.
This is not ELI5
Since it’s completely theoretical at this point, anyone can say anything.
To put it another way, last century there were all kinds of books about life on Mars. Today we can talk about ‘the multiverse’ or ‘different dimensions’ the same way.
The generally accepted concept is that there are an infinite number of universes, and that every time someone makes a decision a new ‘timeline’ emerges. In one world you ate strawberry ice cream, in the next chocolate, in the next you skipped dessert…
It’s a fun idea for science fiction authors and theoretical physicists, but no one has proven it’s real.
Don’t really understand this…
Watch “Spider-Man- No Way Home”
Three different versions of the same guy show up.
That’s the basic idea.
Remember, right now it’s science fiction/fantasy
Could we discuss on the story ?? I mean, it may not be possible for me to get that video.
Here is where you can start: https://en.wikipedia.org/wiki/Trailer_(promotion)
What’s special about that link ??
You can click it, and it’s free, and best of all, you will learn something new which will make you smarter.
It’s a fun idea for science fiction authors and theoretical physicists, but no one has proven it’s real.
Not in this universe, no…
