Normal and Senescent Copy (IMAGE) Michigan Medicine - University of Michigan Caption Normal melanocytes (top) compared to senescent melanocytes (bottom). Credit Maria S. Soengas, Ph.D., U-M Medical Shool Usage Restrictions For registered reporters only 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.