Dr. Krauss,

I attended your lecture at the Cleveland Museum on November 10, and wanted to ask this question during the book signing. I know you don't totally agree with String Theory, but my question has to due with that and multiple dimensions. If I am not mistaken String theory states that there needs to be an additional 11 dimensions. My question is; Why 11 dimensions? Why not 7 or 30 or 400?

--> Sam DiRocco

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