Postgraduate Studies

I have two main reasons to study a postgradute degree and I think they are both importants. The first one is because I want to keep learning more things, someone could argue that you don't really need to take a postgraduate study for that, but I think it's always better if you have professors that could teach you and classmates you could discuss with instead of learning something by your own. It's not always necessary to take a postgraduate study in my opinion, but I want to be a researcher and to get into the academia I think you need at least a PhD.
About the subjects I want to study, I really want to learn more about Human Evolution, but that's a topic that I had already read a lot, so maybe taking a subject like Psychobiology or Neurobiology would be a good option too because that's also closely related to evolution and I could learn a lot more things.
I would like to study abroad, in Chile there aren't too many postgraduate courses that are of my interest and also studying abroad is a good option to meet more people from a different country that are interested in the same things as me. I think a course with physical presence required is the best option, because it's more interactive and you can ask questions more easily if you don't know something.
Finally I don't know if I'm going to be accepted at a good university once I graduate from my current degree, because I don't have any published articles or something like that but I'm trying to get good marks right now to have better chances.