Hello friends, I am graduating in a few months with a bachelor of physics and willing to apply for graduate schools. I am very doubted about which grad school I should apply. I just know what I don't like,but how can I know what I actually like? My main questions are the following: What is the best US Ph.D. school in physics of gravity (or gravitation)? How about Quantum Gravity? What's the difference between gravitation and QG? What is the best US grad school if I want to understand, space and time, gravity, and continue what Einstein was doing? I have found a good university in Canada, but I want one in US. Thank you!