Faulty Fountains of Youth

Adult stem cells may contribute to aging

Skin sags. Hair grays. Organs don’t work quite like they used to. A gradual wearing out and running down of the body’s tissues seems an inherent part of growing older. Rejuvenation of skin, muscles, and other body parts naturally declines with the passing years.

An adult blood stem cell floats amid red blood cells in this stylized illustration.