(NaturalNews) Television viewing before bed is a significant contributor to chronic health problems, according to a study conducted by researchers from the University of Pennsylvania and presented at the annual meeting of the Associated Professional Sleep Societies. Although most adults need at least seven to eight hours of sleep per night, as many as 40 percent of U.S. adults fail to get this much. Lack of sleep is a major contributor to chronic health problems, including obesity, heart disease and depression. In an attempt to find easy ways for people to get more sleep, researchers surveyed 21,475 people over the...