>>131. There is no proof of "another spacetime", you just made it up.
2. There is no proof that our Universe is "inside" of anything, that's just a figment of your imagination. There is also no proof of our Universe having an "outer boundary".
3. There is no proof of a "superspace".
4. Expansion and cooling are not evidence of a "Big Bang", idiot. Try to use your head for once - if modern cosmology could not predict that the expansion of the Universe is accelerating, then why do you think they can calculate the size of the Universe 14 billion years ago? For instance, the Universe may have been very small at that time but finitely so, which would be a lot more reasonable than something getting created out of nothing (as the "Big Bang" theory implies). Or, the Universe may have been larger then than now, after which it contracted and then started expanding again. Cosmology retards do not have any idea.
5. The "explanations" for dark matter that you are citing are both ad hoc and hypothetical. Neither MACHOs nor WIMPs were ever observed, and of course cosmologists cannot explain why these supposed particles are supposedly so abundant. The point is, they could never predict the necessity of "dark matter" - it was just a huge hole in their theories that they had to plug with something. With "dark energy" the situation is even worse - it's supposedly a property of space and totally unexplainable by contemporary science.