If gravity is a "property" of Mass, and mass is a "property" of matter, and matter is known to be composed of highly integral infinitessimal Force Fields, why jump to the conclusion of Gravitons, when one has not thoroughly defined Force Field. Of what are these force fields composed? Is the word Force not that which we use to describe Gravity? is it not evident that all Forces are of the same nature? That of a field? Why does the 'Scientific" mind continually strive to find The Particle? Even the sub-atomics are not particles, and the quantum behavior of even "photons" is past this model. Get Real.