"Please excuse me for being late to class, I was busy preventing heart disease"

New research has shown that hours spent sleeping has a direct correlation to risk for coronary artery disease. For each additional hour of sleep, the risk of calcification of the coronary arteries decreased by 33 percent -- an outcome equal to reducing blood pressure by 16 point elevations. This held true even when confounding factors, such as age, race, cholesterol level, and other possible risk factors were controlled. So, the next time you get in trouble for oversleeping, I'd say that this is a pretty good excuse.