Smiley Face (IMAGE) Duke University Caption A smiley-face-shaped antenna (left) is correctly identified by a new method for passively locating radio wave sources (right). Credit Aaron Diebold, Duke 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.