The Skin of a Mouse's Ear (IMAGE) U.S. National Science Foundation Caption Stem cells are marked in green and a dividing population of stem cell progeny are marked in red. Credit Maksim Plikus, UCI Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.