Hair Today?

By David Bjerklie

In a study that will cause the hearts of bald men everywhere to skip a beat, researchers at the University of Pennsylvania School of Medicine report they have coaxed stem cells to grow new hair, at least in mice. The team hopes to do the same for human scalps but cautions that stem-cell treatments for hair loss--hold on to your hats--are at least a decade away.

--D.B.