Good afternoon gentlemen/women, I have a question regarding Lawrence Krauss' talk called "A Universe From Nothing" (Which can be found at ). In the talk, Krauss says that quantum fluctuations can produce a universe. He mentions that if we were to observe this happening, the universe from our perspective would get smaller and smaller and smaller, whereas from those inside the new universe would view it expanding exponentially. Really an amazing thing to discover, coming from someone like myself who's just now going to college for physics. Unfortunately, however, my mind was racing on the subject and I lost some sleep last night over a question that's been going through my mind. Is it possible that a black hole could indeed be one of these 'universes'? I know that singularities shrink to an infinitesimally small point; wouldn't that be a matching descriptor to what Krauss said? (Of course, I realize we would never be able to see it from the inside, which has my idea turned on his head, because in a way, it might seem like a logical fallacy.) Are there any out there who can ease my mental torment? =P Thank you, and all efforts are much appreciated.