Although doctors may someday heal weakened body parts by infusing them with stem cells that develop into specialized tissues, coaxing the body’s own cells to become self-repairing would be an even bigger biological coup. What if we could simply prompt damaged organs to repair themselves?

News flash! Scientists prove that swallowing magnets is bad for you. Stop the presses! Smoking hurts wealth as well as health. Eureka! Faraway objects can be hard to see.