I don't actually know if i should have started this thread in Astrophysics forum or Particle Physics forum. Anyway here the issue , some theories of our universe say that it may actually be a part of one bigger universe(sub-universe , ....). One theory of particle physics says that matter maybe consisted of Preons , the actual fundamental material of our world and the subcomponents of quarks and leptons. Regardless of how strong or weak these 2 points stated above maybe. what kind of restriction or possibilities i can talk about that our universe maybe a Preon in the bigger universe , and that the Preons in our universe are actually universes of their own ?