I am reading a new book -- "The Road to Reality; A Complete Guide to the Laws of the Universe" by Roger Perose. He is a mathmatician at Oxford ( in England ). I just read a chapter on Hyberbolic Geometry, and it was fascinating (now I want to take a class on HG). There is so much neat math to learn, a person could take math classes the rest of their lives. The mathmaticians that live in the 1700's and 1800's that developed that math that we do today, they were truly geniuses. Once a person had taked Calc, and DE, and other higher math classes, a person can appreciate the development and the thought that went into creating all the different math that exists today. I do, math is cool.