I have just listened the cosmologist Hubert Reeves on a radio broadcast. He says that there are clusters of galaxies, superclusters of galaxies, but he also says that there are no super-superclusters of galaxies. My question is the following: do we know why there are no super-superclusters of galaxies? Is there an insight (not a proof of course) that the size of the universe is finite? It seems to me that if the universe is infinite, it would exist super-superclusters, super-super-superclusters, super-super-super-superclusters and so on... like a fractal structure. There would always be a superstructure for every structure. But perhaps there are some defaults in my vision of an infinite universe.