Originally posted by MichiganSwampBuck
That would mean that nothing can exist without existing in all the dimensions.
[edit on 23-8-2010 by MichiganSwampBuck]
Sounds like you are being a little simplistic when it comes to dimensions...
Let's imagine we live in a two-dimensional world for a second. It's a flat plane, right? So, take that flat plane and curl it so that one edge of
the plane attaches to the other edge. This is what is called a curled dimension, and as you move along that dimension, you'll eventually go around a
full circle and end up where you started.
Dimensions don't necessarily have to span all of space either, that is, they don't have to expand across space... they don't have to be expansive
or not-curled. Many of the dimensions in 10-dimensional space are calculated to be very small curled dimensions that exist within every point of the
space dimensions that we occupy. So, while they may exist, the fact that they are probably so small has no effect on the relatively huge particles
that comprise us. Take the idea that a dimension doesn't have to be all-expansive and apply it to the expansion of the universe. This shows that
dimensions don't have to be a fixed size.
We'll assume that the three dimensions of space are as expansive as the universe. Let's be imaginative and pretend that the dimensions are expansive
in their respective directions for 20 mile.
Again, Imagine the three normal dimensions we are aware of. Now curl one of them up, let's say we'll curl the up/down dimension, which makes this
dimension non-expansive. We can still go on our merry way in the left-right and in-out dimensions...
... but what happens when we attempt to traverse the up-down dimension that is curled? Well, that depends entirely on expansive or non-expansive the
dimension is. Let's pretend the up/down dimension is only expansive for 20 feet inside of it's curl. If you try to go up or down in this universe,
you will be greatly restricted on how far up or down you can go before you come back to where you started.
The above type of universe would be similar to living in a pipe - sort of. It would be more like a football field with ethereal pipes, that you could
walk right through, at every point. As you traveled through the other 2 dimensions beside the up/down "pipe dimension" the pipes wouldn't come into
play because you aren't traveling through that dimension. However, once you started to try to go up/down, you would be confined to the pipe dimension
and you would find that the higher you went up, the closer you got to your starting destination. This is similar to walking around the earth, only
with the pipes you are walking around the inside of the pipe when traversing the up/down pipe dimension. Now, for a moment, imagine that the pipe
dimension up/down circumference isn't 20 feet, but 1 nanometer. As soon as you make a movement up or down, you are already back where you started!
It's as if the up/down dimension doesn't even exist because it is curled up so much!
Now, hopefully, we can see that having extra dimensions doesn't mean they have to be all expansive as our three-dimensions appear to be: They can be
curled up, so tiny, so tiny that we traverse them instantly and they don't even come into play in our reality. This is how the extra dimensions are
represented in string theory.