Laser Pulse (IMAGE) University of Vienna Caption This is an illustration of a laser pulse used to probe a mirror for possible quantum gravitational effects. Credit Jonas Schmoele, VCQ, University of Vienna Usage Restrictions the image may only be used with appropriate credit. 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.