Hello, I was interested in learning more about the possibility that there are several dimensions of space that we cannot physically detect. These spatial dimensions are permeable to radiation to different degrees of permeability. So for example, gravity, being the weakest of the 4 forces we observe, permeates these extra several spatial dimensions and therefore we only see a small part of gravity's total force in our familiar 3 spatial dimensions. The EM force, being the strongest of the 4 forces, would not permeate any of these extra several spatial dimensions and that's why we see it as such a powerful force in our familiar 3 spatial dimensions. I realize this post is very loosely worded but I think the idea I am trying to express (and get help with) is that there may only be 1 force, but for some reason or the other, this 1 force radiates into several as of yet unseen tiny wrapped-up dimensions and that these tiny dimensions 'steal' part of the 1 forces energy. Therefore to us humans, we see 4 forces, where really there is just 1. This is kind of GUTish I admit. Does anyone know of any experiments being done, or slated to be done that would be able to fallsify this idea? I vaguely remember that a Washington group of physicists built a type of pendulum that tested whether to see if gravity leaked into a tiny unseen spatial dimension with an upper limit of 1mm (I think). The experiment observed no such leakage.