String Theory: see previous post.
"In the last few decades, string theory has emerged as the most promising candidate for a microscopic theory of gravity. And it is infinitely more ambitious than that: it attempts to provide a complete, unified, and consistent description of the fundamental structure of our universe. (For this reason it is sometimes, quite arrogantly, called a 'Theory of Everything').
The essential idea behind string theory is this: all of the different 'fundamental ' particles of the Standard Model are really just different manifestations of one basic object: a string."
(Courtesy of www.nucleares.unam.mx/~alberto/physics/string.html)
Official string theory website
Be good to your friends -- Kevin Bacon.