If your insomnia isn’t already robbing you of sleep, here’s more news to keep you up at night; America’s sleep-loss epidemic doesn’t just make us tired at work. It can increase our chances for obesity and even cancer. The National Geographic Channel premiers a new documentary on the subject this Sunday. Sleepless in America looks at the scope of the epidemic, and how our culture stopped prioritizing sleep. University of Chicago medical professor and sleep researcher Dr. Eve Van Cauter talks about why we’re so sleep deprived, and what we can do about it. Photo: Flickr/hang_in_there