From what I read of string theories and such, they always talk about the other dimensions being very small. Has anyone ever thought about making them very large instead to see where the theory leads ? Like a hidden dimension trillions of times the size of the universe etc. Just interesting as another thread talked about the following: "Thinking about reductionism, it may be that there is no absolute size. The universe may be made in such a way that as we get to smaller and smaller items at a certain point we get to (maybe at 10^-100 cm) back to the universe all over again. Like if we look inside an imaginary microscope and get past a small enough size limit we start to see our whole universe all over again. Then going smaller we see our galaxy, sun, earth, ourselves all the way down again recursively forever. At that given size limit where the smallest item corresponds to the entire universe is where "meatphysical entities" lie, or our mind, or minds or god's mind or mathematical objects lie. That ultimate item doesn't respect mathematics in the sense that the smallest size is equal to the largest, so it lies outside this universe and logic and yet it is the interface between mind and matter. A mathematics where 3 is equal to 3^100 may even be possible to construct. The point is that if size is infinitely recursive in this sense, then there is no absolute size or measurement, they are only relative to each other within a certain range. The universe would seem to lie outside of any mathematical description or maybe even any logical description. We have no extension and our mind is the ULTIMATE ELEMENTARY PARTICLE AND COMPLETE UNIVERSE AT THE SAME TIME. One way to imagine a universe with all items having a "constant size" is imagining them decreasing their size in some dimensions of an n-dimensional space and increasing their extension in the hidden dimensions such as their volume is always constant. So the item of size 10^-100 cm will have a length in the hidden dimension of 10^100 cm so as the total volume is always constant. And when the size reaches the "mind as elementary particle" limit it just switches dimensions and starts all over again. I mean a universe and mathematics where the electron (or planck size item) is equal in size to the universe is conceivable and developable, surely by much smarter mathematicians then myself. Interesting. Then what would happen if the universe was an INFINITE DIMENSIONAL UNIVERSE ? Then the big bang could be seen as some small items in a set of hidden dimensions reaching their limits and all of a sudden start expanding in our 3 dimensional universe. Or maybe the dimensions are constantly being created to accomodate ever expanding sizes of items. Or maybe at certain size limits new dimensions come into being to keep the volumes constant. Maybe the extra dimensions introduced in string theories and such should be gigantic dimensions instead of microscopic dimensions. An infinite dimensional universe is even more odd then a universe that has small sizes equal to large sizes. "