Jan Heinemeier, Aarhus University (IMAGE) Aarhus University Caption "Our studies show that the building blocks that made up your Achilles tendons when you were 17 years old are virtually the same when you're 50," explains associate professor Jan Heinemeier, director of the AMS 14C Dating Centre at Aarhus University. Credit Aarhus University 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.