Hi. I am a junior in high school and have been looking into colleges. I want to pursue a career in physics (thinking about the fields of: elementary particles/field/string theory or cosmology/relativity/gravity), but I'm not sure I'll have the credentials to get accepted to one of the top colleges, such as Princeton, Harvard, Caltech, etc. I was just wondering whether there's a difference between the rigor and information you learn at the top schools (Princeton, Harvard, Caltech, etc.) and other schools that are still good, but not the best (University of Pennsylvania, Columbia University, University of Texas--Austin, etc.)? Thanks for your help.