Antimatter and Antigravity Connected ??? The matter in our universe is controlled by gravity which is a long range force obeying the inverse square law. In the large, antimatter cannot be found by astrophysicists and cosmologists. So the assertation that the universe is dominated by matter only is a fact of all experimental verifications. But in the small, the existence of antiparticles were proved facts. The quantum world is dominated by three fundamental forces: EM force, strong force and weak force. Gravity force has no effect at all in the quantum world asides from the black hole singularity domain and relativistic mass where the concept of extremely large mass (matter) is concerned. But if it takes large neutral mass (matter) to make gravity effective, would it also takes large neutral antimatter to make antigravity effective to the point of being detectable? So if a Cavendish experiment is made entirely of antimatter, can the G be repulsive? Matter attracts but antimatter (in the large) repels.