Space curvature or quantum density
Einstein established that curvature of space creates gravity. Also energy curves space. Now. Let's "imagine" (becouse I more than imagine it, let's say it makes more sense to me). There is no curvature of space. But what if some quantum background (maybe dark energy, maybe other thing) has different densities through the universe, exactly in the same proportion of curvature of space. That is, space does not curve, but this quantum background behaves exactly as if space were curved. Example, when there is energy, this quantum field depletes in the proportions space would curve. Different values of this quantum field would then create a gravity force between them. Time passes at different peace in one quantum field with certain density than another, like space curvature. Now, what if one galaxy on its formation aquired much more of this quantum field than another? It would be as if the laws of nature were the same than our galaxy, but with a different gravity co...