Why we must have three dimensions and no more (Introduction)
Excellent discussion:-http://www.newscientist.com/article/mg21929360.700-why-space-has-exactly-three-dimensions.html?full=true#.VIumc2A5C1s
Excellent discussion:-http://www.newscientist.com/article/mg21929360.700-why-space-has-exactly-three-dimensions.html?full=true#.VIumc2A5C1s