irrelivant posts split and sent to wormhole. The aditional dimention idea doesnt sound too unrealistic to me, we have observed and accept other properties that do not fall into our observable sphere such as electron spin. As far as proving something like this goes i dont think its entirly impossible, the maths behind it will need to be refined as the theory grows until its equations can satisfy all the problems they are given, this is probabaly a long way off considering relativity cant even do this yet though (or so some say). I have read a few articles where people want to conduct experiments that allow the detection of strings. I dont see why this wouldnt be possible seeing as they interact with things in our observable dimentions ao we may be able to see their effects or we can made machines capable of picking extra dimentional signals up.