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richard Sun, Dec 16, 2007
I have come across this video several times. I agree that it is interesting, but I think it should be taken with a grain salt. What bugs me about their theory is that they assume the 4th dimension is time. To my understanding, this is not mathematically proper. In math, the 4th dimension is not time - it is the 3rd dimension + one extra parameter for describing position.

Are there any mathematicians here who agree?

Here is a wikipedia article about dimension.