I was recently on a college campus for the first time in a while. It was autumn, and all the leaves had turned different colors. Undergrads were scurrying around, possibly studying for midterm exams. For some reason, college campuses, particularly in the fall, make me think of possibilities. Maybe they remind me of flipping through my own university's course catalog to pick out interesting-sounding classes: virology or biochemistry or French literature. There were so many different things to learn.