If gravitons as they interact with each other (like the gluons does) then their interaction will led to gravitational confinement on very large distances. this approach may lead to one solution to several problem like galaxies rotation curves by itself and also the small amount of dark matter needed for Baryonic acoustic oscillations. Also it may replace the need of dark energy to explain the excess of red shift in the far supernovea of type 1A as quantum gravitational confinement effect. And finally may explain why our universe have only matter without the need to new laws of nature.