Here AHZ,
Read up...
http://www.nuclecu.unam.mx/~alberto/physics/string.html
Thought I'd help you out by pointing out a "thing" while speaking of string theory as well. This is a very elemental explanation offered on that website, it is far more complicated and very fascinating.
Damo stop being a show off. I mentioned earlier that I know as much about string theory as AHZ knows about women outside of the tween set, and right away you have to think up an excuse to show everyone how much smarter than me you are. You thought I wouldn't know this is all about me? No, I know Damo.