: : I suggest that there is no such thing as a "Graviton". : Gravity is not propagated by particles, but must rather be a "tidal force" resulting from a curvature of space-time. : Perhaps a 'graviton' can best be thought of as a fundamental "chunk" or quantum of gravity much like a photon can be thought as a quantum of radiation. To me, it is more interesting to consider the source of this force than its nature. As a 'thought arguement' consider a rotating body in space/time. Due to the different angular velocities at the rim reletive to the axis, the time rates are different leading to a stress on the space/time which is relieved by the creation of gravity.