More than 100 million Americans have high cholesterol, a major risk factor for heart disease. Most people think of their diets as the main cause, but genetics also play a role in both good and bad ways. A noted expert discusses how scientists are harnessing cholesterol genes to lower the risk of heart attacks.
A new cure for infants with Bubble Boy's Disease. Then, a study in the American Journal of Public Health shows that depression, suicide, drug use, and alcohol abuse are rising for people in their late 30s. And finally, does smiling make you happier?