They’re criticized by their parents because they stay up too late and can’t get up for school. They’re considered lazy by co-workers and supervisors who watch them stumble in late for work. Called “night owls” for their unusual wake and sleep patterns, these individuals either adjust by finding jobs with flexible hours, or they become depressed and at odds with family members. According to sleep expert Daniel Kripke, M.D., a professor of psychiatry at the University of California, San Diego (UCSD) School of Medicine, night owls can’t help it. They suffer from a lifelong biochemical malfunction within their body’s...