Today was the first day of the Fall semester. Enrollments are high. I even have wait-listed students for my night-time class. My physics lab today was standing room only. It's going to be a busy semester. It's also a semester in which I'm teaching a class (intro astronomy) that I took as a student 20 years ago. Whoa! It's fun to mention that to the students, because a lot has changed in those intervening years. Still makes me feel old, though!