So, I'm interested in the big questions. I guess that leads me towards cosmology - though, quantum or particle physics, or string theory are also tied to the stuff that I want to find out. I'm doing my BS in physics right now and I'm trying to figure out where I want to go for the PhD. I hear nice things about a lot of places - Uni of Chicago is attractive in particular, both for having a strong focus in cosmology and being downtown in a city I like a lot. I don't really know about how hard those things are to get into though. My credentials are pretty strong - I have a 3.8 GPA, with around that same average in my physics classes, I've done some undergrad research, though it didn't amount to much, and I have some cool looking extracurricular stuff (Astronomy club, and some other clubs that are unrelated but that I do very well in). I come from a mediocre university though, University of Cincinnati. We have a strong science department here, but lets face it, it's not Harvard. I guess my question is, how much does where you come from matter when it comes to getting into great PhD programs like that? Any other advice on getting into them?