Study: Light, Light, Baby

Study: Lack of early light upsets teen sleep clock:  Sit by the window in school? Lack of the right light each morning to reset the body's natural sleep clock might play a role in teenagers' out-of-whack sleep, a small but provocative school experiment suggests. AP.

Study sheds light on 'teenage night owl syndrome':  Students are going to sleep later and may be underperforming in class because they're not getting enough bright light in the morning, researchers say. Better school lighting may help. LA Times.