If you plan to interrogate someone, you might want to start by depriving them of sleep. It’s a tried and true way to make people feel bad. Now, some psychiatric researchers are finding that sleep therapy can be a good way to make people feel better. Can getting a good night’s sleep be the new Prozac? Consider this: “Depression is the most common mental disorder, affecting some 18 million Americans in any given year, according to government figures, and more than half of them also have insomnia.”

+ Why do you always wake up five minutes before your alarm clock goes off?