Form of Flight (IMAGE) University of Edinburgh Caption A ring-shaped air bubble forms as air moves through the bristles, enhancing the drag that slows their descent, according to new research from the University of Edinburgh. Credit Naomi Nakayami 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.