M-theory states that that the universe is 11 dimensional. I understand that the higher dimensions are curled up, but if they weren't, what do they look like? How can the 5th and 6th dimension be ...
Actually I'm learning String Theory, and one of its proposals is that there are actually 25+1 dimensions of which only 3+1 are visible to us-- and the remaining are curled up. However, superstring ...