1) according to string theory, the universe has 10 dimensions, 4 spacial dimentions which we live in, and a pair of 3-dimentional groups which are curled up on themselves.
2)I took a paper to my universities writing center, and they said it was pretty good. I handed the same paper in to two different classes (we were covering the same topic by chance). one teacher gave me and F, largely because the main idea in the paper disagreed with what she believed. the other teacher gave me and A because, in his words, the paper was good enough to "change how he saw the entire problem".
IMO, grades have about 10% to do with smarts. 30% is the work you put in, 20% is luck (is the teacher in a good or bad mood today? which teacher do you get randomly assigned at the begining of the year?), and the other 40% depends on how the teacher grades. if they curve, then the grades of the other students make a huge difference in your final score (one class I had, I god a 7% on one test. that was a B, because nearly everyone did just as poorly.)
One friend in HS got a 1600 on the SAT's when he took them in 8th grade. Smartest guy I know. He failed out of high school junior year. why? because he only did enough work to not fail out, and no more. Then one day, he stopped doing that much. for him, there were more important things in life than school every day. One day in spanish, he took a very long test in about 6 minutes, then left. I got the teacher to show his test after mine was handed in; he had written "All is fire" in Spanish for every answer but one. That one he had gotten right, and I had gotten wrong. He of course, failed the test, and later, the class. but he spent most of the day outside, while I was indoors for 8 hours straight. I can't say who was the dumb one of the pair.
My Comp Sci advisor once said "the smart people I know would do best if they could skip grades 5-16 and go straight into grad school. There you get to teach yourself". mmmmmmm, grad school...