Tiny rounded nanostructures made of DNA (IMAGE) Duke University Caption No bigger than a virus, each of these nanostructures was built using new software that lets researchers design objects out of concentric rings of DNA. Models (top) shown alongside electron microscope images of the actual objects (bottom). Credit Courtesy of Raghu Pradeep Narayanan and Abhay Prasad, Yan lab, Arizona State University. Usage Restrictions Please credit Raghu Pradeep Narayanan and Abhay Prasad, Yan lab, Arizona State University. License Original 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.