Bones and Aging (IMAGE) American Friends of Tel Aviv University Caption Two x-rays used in Dr. Kalichman's research. The hands of a 22-year-old man at top are compared with the hands of a 74-year-old man at bottom. The two men were not related Credit AFTAU 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.