[baudrunner]

I love smart people and I want no more than to direct them away from the incongruencies of metaphysics and toward a practical direction of physical theory. We would all stand to gain so much. What we must do is work with what we have and what is real. I personally think that multi-universes, ie. other dimensions, occupy the realm of metaphysics, ie. merely interesting mathematical diversion. Logical discourse concerning the subject of the one Universe as opposed to multiple universes existing simultaneously must needs be based on practical education whose postulations are based on empiricism, ie. what we have learned and know from what we have seen, and taken from there. In other words, this three dimensional Universe is indeed the only universe in existence for no other reason than that those most fundamental of strings resonate in concordance with the fundamental and sub-harmonics that comprise it to produce only what it is. It resonates as a composite wave to produce reality, the only reality. We are - this is - the expression of creation, not metaphysically speaking at all but very real and existing, which any other possible universe that mathemantics proposes does not. Please, Ms. Randall, mathematics is not the holy grail. Practical science is. Don't waste your time. The Universe is anthropocentric in nature and there is only one logical reason why this is so. All the mathematics in the world can't change that.