|String|---|Theory|

The String Theory is a recent trend or theory is physics which is attempting to formulate a theory to harmonize quantum mechanics and general relativity.It is trying to prove that electrons and quarks in the nucleus are not zero-dimensional,but rather uni-dimensional oscillating lines called strings.It is said to possess only length and no other dimension.

This is one of the hottest research going on in the modern day physics.It has originated from the dual-resonance model which was proposed by Gabriele Veneziano in 1969.There are 5 major developed string theories.Each of them differs in the number of dimensions in which the strings developed and their characteristics.All these theories seems to be correct though.

Once scientists believed there were 5 superstring theories-Type I,types IIA and IIB and the two heterotic string theories.The thinking was that out of these five candidate theories, only one was the actual correct Theory of Everything.But now it is known that it was naive thinking and that each theory is connected.





Reference:
www.wikipedia.org
www.nuclecu.unam.mx
www.superstringtheory.com