Racing Electrons (IMAGE) Vienna University of Technology Caption In this image, a laser beam removes electrons from a layered metal structure. Attosecond technology allows scientists to measure time delays between electrons from different metal layers. Credit Vienna University of Technology 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.