Ah, I regret not. Wormholes, while theoretically permissable, would be tiny, smaller than an atom.<br /><br />The efficacy of String Theory is as follows: a standard physical theory is dependant on four and only four dimensions: three physical and the fourth in time.<br /><br />Early last century (1921), two gentlemen named Kaluza and Klein wondered what could be done if "extra" (physical) dimensions were folded into a theory. And the results were very interesting: aspects of modern physics simplified somewhat with an added dimension, and it became clear that it provided a method for explaining the gravitational force and electromagnetism in the same equation. It was only partially successful, but pointed the way towards a new goal.<br /><br />Later on, in the 1970's, Yang and Mills did the same thing (guage theory), but vastly improved, unifying the strong, weak, and electromagnetic forces all in one equation. Yang-Mills is, btw, one of the bedrock basics of the standard model.<br /><br />But the problem was gravity. To explain gravity as a force as with the other three, it had to be quantized, e.g., emitted as discreet packets of energy, and propogate in certain ways. However, every theory until String Theory provides nonsense answers when you try to quantize gravity - infinities, which clearly cannot be correct.<br /><br />String Theory manages, by the inclusion of 10 or 11 dimensions (depending on the theory, now currently believed to be 11), to include gravity in a grand unification of all 4 forces, and it does not provide nonsense answers with respect to gravity.<br /><br />This is a simple an answer as I can give you as to extra dimensions and String Theory. Hope this helps.<br /><br />(This would now hare off into guage theory, perturbation theory, and the difficulty in determining which set of conditions are the correct ones in String Theory, so I'll stop here) <div class="Discussion_UserSignature"> <p><em>Differential Diagnosis: </em>"<strong><em>I am both amused and annoyed that you think I should be less stubborn than you are</em></strong>."<br /> </p> </div>