On yahoo I asked if "since virtual particles cone to existance out of nothing. Is it possible that anything else ( discovered or not yet discovered in any universe) would be able to do the same, besides other virtual particles " And I got this answer Is it correct? "No. Virtual particles are simply the result of quantum indeterminancy. It is not possible for empty space to have exactly zero energy, so virtual particles continually pop into existence, only to annihilate again a sliver of a second later. If they didn't annihilate, it would violate the conservation of energy."