O-Shape (IMAGE) University of Zurich Caption When faced with a narrow passage, the drone can switch to a 'O' shape, with all arms folded as close as possible to the body. Credit UZH 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.