I just was wondering what people thought about the theory of parallel universes. The theory states that there are infinite parallel universes where a different decision was made that changed following events. Also, I think the term might be better called Parallel Multiverses.
Everything that exists in our universe that allows it to exist wouldn't be present in a parallel universe is what I meant. Size is one major characteristic, if we are trillions of trillions of light-years cubed, than the parallel universe would either be negative or nothing. Although, it can be argued that there are a large amount of factors present that can possibly support the existence of a parallel universe. This is just my opinion, I do take in consideration that there are many other theories that make just as much sense.
One therory of a parellel universes which goes against your size point is that parallel univeres are in differnet diemensions. I've heard this I think its kindve far fetched but hey who knows.
It would make sence and would be interesting to study i think that the idea is very far feched it was introduced in a 1920 novel so it is unlikly but possible!