http://news.discovery.com/space/super-civilizations-might-live-off-black-holes-110430.h... more fanciful than declaring there are multiverses. Brian Greene's new book (The Hidden Reality) is discussed here. It is a reasonable proposal that states such a theory should be considered, since much of the theoretical math leads there. But he is quite clear in his view that it is all speculation and 'not science' at this point, and it may never be proveable:-http://physicsworld.com/cws/article/indepth/45854