Can you be a theorist "on the side"? Say I go to graduate school for experimental physics, and eventually end up in a government or university lab. Now, I realize that theoretical physics is also a full time job, but what I mean is, is it still possible to publish one or maybe two papers a year in the theoretical realm, if I do that in my spare time? Has this been known to happen? What if I took my PhD to law school, and became a patent lawyer by day? Could I still produce and publish some sort of theoretical physics in my leisure time? (experimental would be hard w/o the equipment). Patent lawyer by day, superhero physicist by night maybe?