Hairless mice of the world, rejoice. Scientists have found a way to grow new hair follicles on your bald bodies using stem cells. The study could be good news not just for furless mice. The Howard Hughes Medical Institute researchers who performed the study are also hoping the stem cells will grow hair, as well as skin and sebaceous glands, in humans. The study, which was published in the Sept. 3 issue of Cell, showed that stem cells taken from the hair follicles of mice could self-renew in a dish, and when grafted onto mice could grow into new follicles and hair.