I've been considering a possible career pathway towards becoming a university professor/researcher for quite some time now, and I actually have some questions concerning that. Actually, first of all, what is the difference, if any, between a professor and a researcher? Secondly, aside from publishing and research, I've heard that some professors do not have any teaching duties. To what extent is that true? And last of all, is a professor/researcher expected to publish his work regularly and consistentl? Does he/she run the risk of getting kicked out of the university for being a lazy bone?