Do parallel universes exist?
913586
the parallel universe theory, just like string theory, and bubble universe theory, are simply elaborate "what ifs". but none of these are based off of any empirical data, and are completely unfalsifiable, and therefore unscientific. in fact, this theory actually came from scientists who decided to disregard a generally better established explination of the of von Neumann's quantum collapse postulate.\n\njust in the same sense that, if i lock all my doors and windows, and christmas presents get under my tree, it doesnt mean that santa put them there.\n\nthere is too much quantum mechanics for me to explain, but i have a fellow lab student who is doing quantum computing who agrees with me on this point. and this is the general consensus of the scientific community.
457925
Well there are 3 spatial dimensions and one temporal dimension, so there's 4 to begin with. On a macroscopic scale the universe behaves like a minkowski space. However on a microscopic scale even 4 dimensions isn't enough, the maths suggests possibly 11 or more dimensions.\n\nHowever I have a feeling you're not talking in the strictly mathematical sense. If you meant "are there other universes 'beyond' ours", then I have no idea. There are theories that suggest there are, but as far as I know there are no known observations that could answer that yet. We'll just have to wait and see what is discovered.
382778
There could be more than one universe, to assume otherwise is making the mistake of thinking that there are scientific facts. There are only scuentific theories, NOT facts.\n\nIt is possible they could collide as galaxies do, but like galaxies they may simply pass through each other.
729095
Sometimes, when people cannot fathom or answer an issue, they turn to blind faith for that answer.  That is not the scientific approach and, carried to extremes, such blind faith can lead to the Dark Ages when very little was done to advance mankind's knowledge.\n\nThat being said, string theory can lead one to conjecture about the pre-big bang.  (I like your "big suck" idea by the way.)  String theory conjectures the possibility of parallel null universes, devoid of observable mass-energy as we know it.  Then, according to the theory, two of these big nothings collide.  Since they have an eternity to do it in, one can even show (using simple probability) at least one such collision is likely over an infinity (eternal) number of attempts.\n\n(If the concept of two "nothings" colliding gives you a headache, join the crowd.  Nothing, however, is only nothing in our limited four dimensional observable universe.  String theory goes up as high as eleven dimensions; so if these null universes exist in these higher dimensions, they would seem to be nothing to us because we cannot see beyond four dimensions.)\n\nSo two null universes collide.  When they do, the collision releases a lot (I mean A LOT) of energy (and mass, its all a jumble in the beginning).  That released energy-mass is what we on Earth now call the "big bang."\n\nThe last part of your question, re another big bang in our universe, is also a possibility according to string theory.  There is no reason to limit our null universe to just one collision with another null universe.  We can say "at least" one collision, because we live in one of the results.  \n\nBut there could very well be others, where our null universe has collided with other null universes, and not necessarily the one our null collided with to create the observable universe we live in.  Which brings up the possibility that other observable universes in our null universe might be totally different from our own.
439360
I don't quite remember the movie . . . but as a multiverse . . . where the outcome of any possible scenario has happen in a parallel universe . . . \n\nThere have many theories about it . . . none have been proven yet.
415793
possibly its infinite\nbut its an argument you will find quite interesting to discuss with REAL people. im no astronomer but a thirteen year old student.i can tell you that there is the M-theory which states of parallel universes.the string theory says that there is a 12th dimension which is outside the boundary of this universe. Now we ask what is beyond that? its hard to answer. But we should never let our Heads be larger than our Hats!
825548
I have heard of the theory before, I wish I could remember the scientists name in the UK who proposed it. Well he may not have the one who proposed it but he was the one featured in the documentay. Its outlandish by most peoples standards, but its a very interesting theory. What I remember most about this gentleman is that he is so paranoid about what could he happening in parallel worlds with his own self that he is terrified to leave his house.....it has to do with every single thing we do affecting our parallel lives in other dimensions and realities.\n\nI would suggest looking it up on www.coasttocoastam.com George Nori and Art Bell touch on stuff like this all the time and have a lot of interesting guests that discuss it.\n\nI first read about parallel lives in a book by Dick Sutphen called "Unseen Influences". This book touches on how every thing affects our lives from processed foods to alien abductions and everything in between. You might want to have a look at that too.
978255
In theory, yes.  We already have a theory of and some say fact in a parallel universe and that is the concept of heaven and hell.  Both parallel universes, or perhaps one in the same.  Parallel existence in spiritual form.  Physicists are theorizing now that there may be far more than just two dimensions.  Prof. Stephen Hawking theorizes that here could be as many as 64.  M theory pertains to the basis of every particle is a little string of energy.  It is this little string of energy  and its behaviour in relation to gravity that have physicists intrigued.  \nIt is believed that gravity is an incomplete energy.  Being incomplete,  some of it spills out and is lost somewhere.   This relationship is established by magnetic energy being able to overcome gravity so easily.  It is where this lost gravity goes that has scientists so intrigued in parallel dimensions. \nFor instance,  Black Holes have such intense gravitational fields that they can bend and absorb light, yet magnetic fields can overcome gravity quite easily.  Where does the gravity or gravitons go?  The same goes for quantum physics,  where does the light go?  It isn't absorbed or cancelled out.  It is believed it may spill over into other dimensions.
486453
By definition, parallel lines can never intersect or meet.\nParallel universes, if they would exist, must behave similarly to be truly parallel.\n\nConsider: If parallel universes were to be within a few billion light-years of each other, they would eventually be drawn toward each other. Result: No longer parallel.
1018923
Dimensions are not the same thing as a parellel universe.  It's one popular misconceptions carried on by mystics but created by turn-of-the-20th-century scientists when spirits were thought to exist in higher dimensions.\n\nDimensions are concepts of sides of objects and time, no more, no less.  We exist in what is visually a four dimensional universe, height, width, depth, and time.  We can't visualize objects in higher dimensional space because there is no evolutionary advantage to such a thing; tigers don't leap out at you from the fifth dimension.  String theory suggests there are 11 dimensions (or more); at the Big Bang all the dimensions existed at once then split apart.  Our 4-dimensional universe expanded in the however many other dimensions (the number depends on the theory) shrunk down to the Planck length (10^-35 meters).\n\nA parallel universe is usually what people and mystics mean when they say dimensions.  Even though a parallel universe is technically just another universe existing just out of reach of our own (possible even nanometers away).  This theory seems to be common to multiverse theory, string theory, m-theory, and a few others.\n\nOnward, if we shrink to smaller than an atom, down to the Planck length for example, we'd not lose our four-dimensionalism.  We'd just be really, really small.  We wouldn't be visible to the naked eye nor the most powerful of electron microscopes.  Nothing that exists today can probe down to that desperately small scale; there are plans to eventually do so, however.  We wouldn't slip into another world or into a 3-dimensional space (length, width, and time).\n\nThis isn't an insane question, nor is it stupid.  It's actually asking something very simple.  Remember Einstein asked himself a simple question when considering light.  "What would happen if you were to race alongside a beam of light?"  Einstein was a master of looking at things at their simplest level; from that question above came one of the most remarkable and elegant theories ever to exist: Relativity.
732465
At best, it's only theories. There is no conclusive proof of other universes or a multiverse.
175717
I've heard of this parallel universe theory..well, it's not a theory really it would be like a conclusion if string theory is someday proved ; there may be infinite universes each with a different law of physics and ours will be just one of many others .\nsounds weird huh? that there are hidden worlds beyond ours, well, that's because there are particles like e- that can stay in more than one place at a time ..so one explanation could be that this particles don't exist just in our universe but in an infinite number of them ( parallel universes)..reality is even more amazing than fiction sometimes :P
208199
If you accept that there are multiverses then you would have to accept that their space and time would exist within the same frame and scope as our own.
818029
I am going to put a slightly spin on this question. I DO believe that there are parallel universes. There are at least as many universes as there are people and possibly as many universes as there are living things. We each experience a different universe, but they all exist at the same time. Our "Universe" is what we experience (see, hear, smell, taste, feel, and any other undocumented sense). THAT is where parallel universes come into their own, and THAT is where relativity comes into play. My universe starts with me where I am and ends "out there somewhere". I will never get to experience the end, because wherever I am will always be the start of my universe.
1044107
None.  That is the point.  If they exist is not proved, and hypothetical tests to see if they exist are flawed.  \n\nOn your other question of visualizing multiple dimensions, I have a few hints.  Have you read Flatland yet?  Start there, its good, and not overly mathematical.  Multiple dimensions can mean different things to different scientists.  We use them all the time for their mathematical properties.  But mathematics is just a description, the real world is something observable.  In terms of observation, you would not be able to detect a separate dimension by any means pedantic.  We may be able to prove that physical space has more than three dimensions, but that does not mean that those other dimensions are physical space.  Just like time.  Some particle interactions appear to go backward in time briefly.  What if there is more than one time dimension?  \n\nSo the classic three dimensional physical picture of multiple dimensions will always be flawed by the observers expectation of the properties of the unseen dimension.  Which is why we describe those dimensions using 'imaginary' constructions.  Hope this helps a bit.
1087025
Personally I don't reject the idea, but I don't exactly embrace it, either.  \n\nLet me pose this to you:  If there are an infinite number of universes, and let's say, just for now, that there is a Divine Creator, did this ONE being create the infinite universes you describe?  Or are there in infinite number of this Creator?\n\nNext thought:  If, for every action/thought/possibility there is a separate universe, on how many of them would you actually exist?  On how many universes did life on Earth actually form (assuming evolution)?  \n\nLastly:  Take the statement that there are an infinite number of possibilities and that what we perceive from instant to instant is merely what we have CHOSEN to perceive at that instant, is there a separate universe created for each of those possibilities which are not perceived, or, because they aren't perceived (therefore not "real") do they fail to "launch" a separate universe?\n\nIf you haven't noticed, I find the ideas of possiblity incredibly fascinating. \n\nI hope I didn't make your brain explode!
236672
it's a hard question to answer, cuz same as you can't be certain they don't, you really can't know for sure if they do !! Although I can't say they exist ... i don't really see it impossible ... they "might" exist ;)