It seems like your question might be a bit unclear. If you're asking:
"How many universes are we living in?"
The answer from current science is: one.
We live in one known universe—the observable universe that includes all known matter, space, time, and energy. However, in theoretical physics and cosmology, there's a concept called the multiverse, which suggests there might be multiple or even infinite universes outside our own, each possibly with different physical laws.
These ideas come from:
String theory
Cosmic inflation models
Quantum mechanics (Many-Worlds Interpretation)
But to be clear:
#JAIDIXIT
👉 There is no experimental proof yet that other universes exist. It remains a theoretical concept.
Multiverse ;)
The existence of multiple universes is a theoretical concept in physics, such as the multiverse theory. Some formulations of this theory suggest the possibility of parallel universes or alternate realities, but currently, there is no empirical evidence to support the existence of other universes beyond our own. It remains a topic of ongoing scientific investigation and debate.
Simple answer: we don't know. 10^500 is the number of permitted solutions to the equation that is the basis of M-Theory. In other words, M-Theory not only predicts a universe that looks exactly like ours, but it also predicts 10^500 other kinds of universes. It's as if someone wrote down an equation for the current assets of Google Inc ("CA(G)") as CA(G) > $1 and took note that this formula correctly "predicted" Google's assets as of 2014 January 1. At the present time, we don't yet know if 1) M-Theory is anything more than a mathematical oddity with no connection to reality. 2) There are other universes out there. 3) Those other universes also obey the rules of M-Theory. 4) Those other universes -- if they exist at all AND obey M-Theory -- are like ours, or are (instead) a completely different solution to the formula. 5) There is one to one correspondence between "permitted solution" and "other universe." For all we know, 40% of all other universes are like ours, 17% are solution 175,023,985,254....998 to the M-Theory Equation, and the rest are "other solutions." Right now, all we have is speculation about the above questions. There may be one Universe, there may be 100 trillion, there may be 10^500, there may be an infinite number. We just don't know. Perhaps future minds can answer these questions.
Yes, there are 100 cenquinsexagintillion or more universes (with 100 billion+ galaxies in each one) in the multiverse.
Theoretically, there are infinite parallel universes in the multiverse, however it is not necessarily widely accepted that the multiverse exists.
Nobody knows. There are ideas that there many be many universes such as ours. There is no evidence that there is anything else.
It is thought that there are other universes that look like ours. It is also been suggested that there are an infinite number of universes.
That is unknown. Some hypotheses based largely in mathematics have suggested that this is possible, but there is no direct eveidence that other universes exist.
Some cosmological theories predict the existence of not just one universe (our own) but many - possibly even infinitely many - universes (or multiverses). However, since they were all created in the Big Bang, these theories also predicts that no information can escape from those universes to ours. If that is true, then we cannot know.
The answer is simple: they don't. Indeed, as of now, there isn't any evidence that universes other than ours even exist, let alone whether they have life. At this point it's only speculation.
Meaning, as in, who discovered we were living in a series of universes? The universe was discovered by ancient Indians and Greeks, when theories of personal universes governed by physical laws were first introduced.
What "other universes"? There is no clear evidence that such "other universes" even exist. If they do exist, it would likely make no sense to speak about how old they are NOW. Even within our own Universe, it doesn't make sense to speak about "simultaneity" between far-away points; this means that the word "now" is not clearly defined!
Well, there is a formula to figure out how many combinations of universes there would be that fit in the size of the observable universe. The formula is spacetimeatoms*elements and by working this out you would get 10 to the 225 power, factorial.
5
Multiverse ;)
No, time traveling is impossible. Unless u travel at the speed of light were your gravity has to be at least 0 kg If you think about it when you look into a massive telescope into close universes, you can see that ours is more developed then there's because universes keep expanding though out space so ours is therefore more futuristic.
If you are in, or aware, of the tenth dimension, this means that you are able to place yourself in any realm of possibility (and impossibility) that you can imagine yourself in. Essentially, you can change the entirety of the world around you to the exact specfications you see fit. The Tenth Dimension is the sum of all possible universes that have the same initial conditions as ours, and the sum of all possible and impossible universes with different initial conditions as ours. Basically if you can interact or are in the tenth dimension... there is nothing that can't be done... anything can be done.