To pee or not to pee in the shower, that is the question. Various surveys have shown that lots of people do it — one questionnaire on BuzzFeed found that more than 80% of those surveyed say they do.

Fine Hall, the 13-story home of Princeton's mathematics department, has so many rooms that even the most dedicated numerophile lacks the time to get acquainted with them all. It's unsurprising, then, ...