Clip Closes Door on Leaky Heart Valves
A clothespin-type device that clips together the partially open doors of leaky heart valves may obviate the need for open heart surgery in some patients, doctors say.

Sleep Habits Vary by Ethnicity
Sleep problems and sleep habits vary among different ethnic groups, according to a new national survey. But among all ethnicities, there remains a common denominator: Many of us simply don't get enough sleep.