Hello Of course, I am thinking way too far ahead. I am just a high school student. This year, I will apply for universities. I am quite certain that any major that I consider will involve quantitative methods but I cannot decide what to specialise. I love both math and physics. I perhaps will apply for joint math-physics or double major them. It seems like lots of universities offer joint math-physics programme but I haven't found any that offers the joint in graduate level. Perhaps when it comes to graduate level, materials become too specific and we really have to focus on our specialities. But I really want to pursue academics in number theory and elementry particle physics. If I don't make tenure, I am also considering quantitative finance option so in weekends, I satisfy my intellectual desire. Is realisitc to get a phd in number theory and elementry particle physics? I will give myself some serious thought about this during my university when I face the actual math and physics, maybe by then I will have more clear picture of my future. But since I first I have to apply for universities, I will appreciate some advices from experienced people in forum.