Camping Syncs Internal Clock with Nature

Light, both natural and artificial, is a powerful cue for the circadian clock, the internal timing device that tells us when to wake up and go to sleep, when to eat, and when we are most mentally alert. As is common knowledge, people differ in terms of their natural rhythms, varying between larks (early risers) and owls (late risers). In this video abstract, Wright and colleagues explain how they measured the circadian