I study sleep in mammals. I tend to ask the "journalism" questions of sleep as a behavior, "who, what, where, when, and why?" Evolutionarily, sleep has always seemed like an odd-ball to me, and while we are no closer to answering the "why" component, my research has started to hone in on the "who" and "when" factors, which can both provide important insight to this activity engaged in which we spend a full third of our lives.