Can't there? Of course there can! The problem simply is that at this time in our evolutionary process, we as yet have no observational/experimental evidence but can logically speculate without any need to resort to some unscientific magical supernatural nonsense.....you may like this.....   So perhaps our problem is simply what "nothing" really is. Perhaps the quantum foam can be redefined as nothing...at least its pretty damn close to nothing, and far more likeley then any u