How many dimensions do you believe exist,  I know we live in 4, But how many more could exist?
470490
String Theory says there may be several more; up to 10 more dimensions, IIRC, but they can generally be ignored, in "real life".  This is because the extra 10 or so are tightly "wound up", so they act as if they are not there, most of the time.\n\nWords do not suffice to discuss String Theory; you need mathematics.  Howver, my maths skills are limited, so I just read the simplified verbal summaries.
1067957
No matter how many 'experts' around here claim that there are alternate universes or other dimensions or a brick wall, nobody--repeat NOBODY--really knows. Tons of theories, but not one single shred of evidence to support any of them.\n\nScientific research has repeatedly indicated that our universe is infinite in scope, and that it will expand forever although its contents (mass and energy) will very, very gradually fade away to nothing.\n\nBefore our universe began, and right now, there's probably nothing else but an absolute and infinite void totally without energy, mass, spacetime, dimensions or anything else.
651638
first of all, its not NASA at all, its "String Theory", and theoretical physicists, that are proposing the existence of 11 dimensions.\nwhen we talk about 11 dimensions, we'll refer to them as 10+1, that's because it is 10 dimensions of Space, and 1 dimension of time. as you know there can only be one dimension of time. but in space we are familiar with 3 dimensions, and it is impossible to visualize space with more then 3 dimensions. so what are the other 7 dimensions? they are what we call Celabi-Yau spaces, they are microscopic dimensions that only affect objects as small as for example electrons, photons, quarks, and all other subatomic particles. even though we cannot visualize them in any way, it make perfect sense from a mathematical point of view.\n\ndo a google search on string theory, if you would like more information.
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.
169253
It's possible according to Brane theory.  Brane theory is a hyperdimensional theory in which all of reality consists of 11 dimensions.  In this theory, our universe is a "membrane," having the physical laws and constants necessary for life as we know it to exists.\n\nIn Brane theory, there are infinite numbers of parallel "membranes," or universes if you will, existing beneath visible reality.  These membranes may be incredibly like our own or so different that life as we know it can not exist because of the difference between physical laws and constants.\n\nIf brane theory holds true, then there are parallel universes that exist just beyond our reach.  There's even talk of trying to recreate the conditions of the big bang, because in theory, it would spark another universe, without affecting our own.
8671
M Theory attempts to go beyond superstring theory and purport that the multiverse is made up of 11 dimensions. \n\nM Theory is based on mathematical calculations and not empirical data. However, M Theory does successfully account for every issue of all superstring theories (classical, quantum physics, etc) and mathematically postulates the number to be at 11. \n\nFor more information:\nhttp://en.wikipedia.org/wiki/M_theory
83422
Scientist belive there are several dimesions.  Remember dimensions are based on measurement.  Length width height, 3 dimesions so we are in the third dimension.  A showdow for example only has length and width so it is the 2nd dimseion.  We cannot comprehend other demensions because we live in a 3d world where only LWH exist.  It is like asking your shadow what is tall, he would know because he lives in the 2nd demsiond.  So there are other dimensions yes and we can dicipher them though the wonders of mathmatics and physics.\n\nGravity works likes a bowling ball on a bed.  Think of the bed as the fabric of space.  If you put a tennis ball on the bed it would "gravitate" towards the bowling ball.  This is the theory of realtivity.  A worm hole forms when a really heavy mass punches through that space fabric.  If you had a million pound bowling ball it would go right though the bed.  The same things happens in space that heavy mass punches right though to the other side forming a worm hole.
271997
It's amazing isn't it?! It's so beyond our technology to fully test the theory though. I do however believe in parallel universes because math proves that you can have more dimensions beyond what we possess. Have to be able to open your mind to understand, ya know?
1134654
We observe four dimensions everyday, three spatial and time.\nTime is called a dimension because it makes mathematical sense to do so. \nBut...theories such as string theory predict that the space we live in has in fact many more dimensions (frequently 10, 11 or 26), but that the universe measured along these additional dimensions is subatomic in size. As a result, we perceive only the three spatial dimensions that have macroscopic size.\n\nThis is not so strange as it sounds, which I'll show with an example. Imagine you are in an airplane, flying over sea. Seen from a height, the sea looks flat, two-dimensional. But when the plane looses height we start to perceive the waves, that move in a third direction we could see before.\n\nThe universe could be the same. Four macroscopic dimensions and a few more, hidden ones. We can only perceive them for instance, by the small effects their existence might have on subatomic particles.\n\nSerious enough?\nThe reference is a general article on the mathematical notion of dimensions, that contains links.
182923
Yes. But, it's just a personal assumption, although it is an assumption held by the majority of people.\nThe most well known 4 dimensions are best described as width, length, depth and time. The order you list them does not matter, and there could be more - but humans have difficulty relating to more than these 4 (apart from imagining what they are like). The easist way to explain what a dimension is, is to say that you need all 4 to describe where an object is located.... eg, as a real world example I could tell you that I am located in a building at a certain cross-street (=length+width), a certain floor (=height) and at a certain time. You need all 4 dimensional descriptions to find me.\nTime is definitely the hardest of the 4 to properly comprehend. It's hard to think of time as being similar to length or width or height. It is special for sure to us humans, but that is only because our brain operates as a function of time... which means we are fooled into the perception that time 'moves'. Time does not move, no more than 'length' moves. You mind changes with time, just like the slope of a hill changes with height, but there is nothing to suggest that there is a certain special moment called 'now' that is somehow different to 'the future' or 'the past'. Read any scientific article on the topic if you really want to find out more about this 'special' dimension (see source link for an excellent read).
986664
Well, its been theorised that what is beyond the universe is a fourth dimensional bowl. Basically our universe is a 3d soup encased in a four dimensional bowl. How was that made? I would think the same way that our universe was created. I mean, we have only just begun to comprehend the world around us, many of the theories that are coming out are exactly that theories because we really dont know. Untill we can explore more of our universe, we arent really going to know, and if its in a 4th dimension, we really wont know. But, what you could do, is look at some of the sources, and hopefully those will help.
1151026
According to classical physics 3: length, wideth and depth.\nModern physics add to that a fourth dimension - time.\nThose we now for certain exist. But there could be more (as much as 10 or 11 according to superstring theory).
471213
It all dependend where you are filling time. In an insane intitution there are people who experience 4 ,5 of more dimentions . so far I have heard of 26 dimensions being filled including many dimentions of time.\nSpace and time have the same thing in common they can be filled both at the same instance!
390483
There are heavenly many dimensions.\n\nYours sincerely,\nThe Immortal God.
705451
If your legs lived in, say, the 4th Dimension - how would your brain be aware of them since it exists only in 3 Dimensions? We are physically in 3 dimensions (time is an illusion made to mark the difference between one state and another) - we can comprehend of separate parts of our bodies being in different dimensions as much as a stick man drawn on a piece of paper can imagine moving freely around the room in 3 dimensions.  We can only visualise higher dimensions using tricks such as looking at the shadows cast when a 4 dimensional object is illuminated inside a computer program.  What would it matter how big the sock was to be pan dimensional? Good question though.
44234
Well there are lots of things I do not completely understand about the structure of the universe. \n\nFor example, some current theories are that our 4 dimensional space-time continuum is just part of a higher dimensional entity, where some of the other dimensions are rolled up. However, the time dimension of our 4 dimensional environment is clearly much different than the spatial dimensions, since we appear to only be able to travel in one direction along the time dimension, although many of the equations capturing the physical laws of our universe are invariant when we replace time with -time.\n\nThe expansion that people refer to when they say that the universe is expanding refers to the entire 4 dimensional space-time continuum and possibly some  of the other dimensions as well. This gets very hard to visualize. What I do is think of us as ants living on the surface of a balloon that is being slowly inflated, so the dimensions of the balloon are increasing, and distant parts of the ant's space are becoming increasingly distant. However, this is probably a very limited analogy. \n\nTo get a better picture, you need to consult someone who has thought very hard and very carefully about what the universe is, or supposedly is.
326353
Some physicists estimate as many as 12 dimensions. \nAbsolutely there's a spiritual dimension that we can not see as long as we dwell in the flesh.