I would think that over cosmological distances even if the effect of extra dimensions on the propagation of gravity was tiny, Less than half a human hair, the n

I would think that over cosmological distances even if the effect of extra dimensions on the propagation of gravity was tiny, Less than half a human hair, the net effect would be measurable especially if there are not just 1 but 8 extra curled dimensions as M-theory predicts. Well thanks for confirming that what I was thinking was an accurate criticism and I hope that physicists can devise an experiment to prove or disprove the extra dimensions some day soon.