I read this, and was reminded of this thread:
WASHINGTON (Reuters) - Mice with deep skin wounds can grow new hair, scientists said on Wednesday in a finding that offers hope for a baldness remedy for humans.
The mice regenerated hair at the site of the wound via molecular processes similar to those used in embryonic development, according to the research, published in the journal Nature.
The findings show mammals possess greater regenerative abilities than commonly believed. While some amphibians can regenerate limbs and some reptiles can regenerate tails, regeneration in mammals is far more limited.
Dr. George Cotsarelis, a dermatology professor at the University of Pennsylvania School of Medicine in Philadelphia who led the study, said the findings dispel the dogma that hair loss is permanent in people and other mammals, and that once they are lost new hair follicles cannot grow.
