"Most people will have a hard time accepting that their fundamental existence turns out to be the subject they hated in high school." Discover magazine has an interesting interview with MIT cosmologist/philosopher Max Tegmark, who argues that “there is only mathematics; that is all that exists.” Tegmark's ideas the latest development in a line of thought that mathematicians, physicists and philosopher have been thinking about for years, millennia even. A good way to jump unto this subject is to read physicist Eugene Wigner's classic "The Unreasonable Effectiveness of Mathematics in the Natural Sciences."