First off, I wanna start by saying that I do not research this, simply because I believe it to be a lot of hypothetical, thus (to me) it's a complete waste of time, so I'm just using my brain on this.
I believe that there can only be one universe, or an infinite number of them. I believe this because The universe can only be finite once, or infinite. Everything has one life and one death, they always live, or they never live. If this is true, then Everything is either constant, or finite, once. I don't believe in a number of dimensions because that would mean there are a numbered set of universes. If it's the universe, shouldn't it mean everything? So can there be 26 everythings? There could, but I find it unlikely.
If that holds true, then there is either an infinite number of universes, or there is only one. I say infinite because I believe that our lives are determined by chance. There's a chance I may have not written this post, but I chose to. There's a chance I didn't run at a guy during my LARP practice today and end up tackling a tree, but it happened.
I'm going to try to say this as clearly as I can, but it's probably going to get pretty confusing. If our lives are in fact determined by chance, then what happens if I make a choice in our universe? Would the scenario of another choice happen in a separate universe? Let's say you're rolling a die. There are six possibilities on a standard die. First, you roll a 2, then you roll a 4, then you roll a 5, then you roll a 3. Those are all different turnouts of the same scenario. But what if the scenario changes? What if you're rolling a 12- sided die? then the entire scenario changes.
Same thing with the universe. If something happens on universe A, perhaps the opposite happens on universe B, and something somewhat inbetween on universe C, and something else in universe D, and so on. But what if a previous decision set a completely different scenario in motion? For example, what if I decided not to go to LARP practice? then there is an entirely new set of decisions that have to happen.
This doesn't just affect humans, we can break this down with animals as well. What kills and eats another animal, what animal successfully defends itself against another animal, and so on. It would go so far as to where a blade of grass grows in a field. All of these chances, no matter how big or small, affect the space time continuum.
If this is true, then there would have to be an infinite number of universes that play out all of those chances. Maybe one would be the exact same as ours, everything happens in life in that universe the exact same as it does in this one, except for a tree grew two feet to the left in one universe versus the other one. It could be as small as that, but it would still require an entirely new universe because that altered chance can and will alter other chances in the past as well as the future, and those chances will continue to affect one another in different ways, and so on and so forth.
It's either that, or there is only one universe. This single universe, that would literally encompass everything, would have to be controlled completely by some type of cosmic force that pre-determined everything. it's existence, what it is, what happened in this time, in this location, etc. Whether it be God, or whether it be another type of cosmic force. If this were true, then there would be no free will, and we would have our choices laid out for us. We may think that we have free will, but in reality, we wouldn't. We would think that we have free will because God isn't going to hand you a map and schedule and say (at this time, you're going to do this.) But your path will be pre-determined.
If the universe is singular. Then there is a single path you take, and truly, nothing else really matters.
Again, I want to note that I don't research this stuff, so I could be completely wrong. I don't read about quantum, I don't read about universes, etc. This all was just a train of thought that I typed as I was thinking, so flaming me for what I say will just be retarded.
