He mentioned it in one of his lectures, I only remembered because I looked up Heim afterwards. He mentioned a Russian physicist too but the name evades me. At the time he was talking about the scientists that inspired him being the ones that realized the "vacuum energy" was infinite or at least huge, rather than thinking of the vacuum as empty. Heim was of course, one of these. Haramein finds the way that most physicists simply ignore the vacuum energy ridiculous. So do I, for that matter, Einstein explicitly stated that the nature of the vacuum energy would have to be understood to give us a theory of everything.