We spend a third of our lives doing it, so how much should doctors study it? Go ahead and ask medical students how much time they spend in the classroom learning about sleep — wait, that’s a bad idea. They’re busy cramming for an exam and they’re exhausted. Whoa, look at that one’s eyes. But hypothetically, say you were to nudge awake some slumbering soon-to-be white coats in the library and ask that question.