Consider the feynman diagramms for two freely propagating particles...Correction from one graviton exchange. Correction from two graviton exchange.The problem at hand is the divergence (of the math) at arbitary energys and each additional graviton exchange. So there are several resoultions and one seems to be String theory. My question is how does string theory solve this? I understand that String theory represents things (this is precision) as 1-d strings, but how does that resolve the divergence? I believe this is a well know concept, so I hope not to fidle with the mathematics. I know that this is a messy and rough description. I am refering to Polchinski. Thanks for any help!