Dissolving Polymer (IMAGE) Penn State Caption A nanotree made of DNA can be reversed under standard physiological conditions without burning or other harsh interventions, according to a new study led by Yong Wang, associate professor of biomedical engineering at Penn State. Credit Penn State Usage Restrictions Non commercial use 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.