String+Theory


 * String Theory **

String theory, a theory which seeks to unify all forces of nature, suggests that everything is made up of vibrating strings of energy, some of which spread out to form branes, which are membranes of energy in a multiverse, a place where many universes exist. The big bang could have occurred due to a collision between two branes. Our universe is a brane. Gravity may be weak because gravitons (messenger particle for gravity, whereas messenger particle for EM is the photon) are represented by closed loops of energy, thus they can travel between universes, between branes. Other forces of nature have messenger particles which have open ends, and stick onto our brane. For string theory to work, there would be 3 spatial dimensions, 1 dimension of time, 6 dimensions which only exist in strings, and an additional dimension which must exist as a consequence of “M-theory”, which proves that string theory may exist in 5 different forms. Thus, we live in a world of 11 dimensions. *Gravity cannot be explained by quantum mechanics, as expected due to the fact that quantum mechanics describe very small things but gravity describe the very large and seems a whole lot more predictable. String theory attempts to unify these four fundamental forces of nature.