Glowing air-sacs (IMAGE) University of British Columbia Caption When researchers mounted the air-sacs of the larvae on a microscope that just happened to have ultraviolet light illuminating the microscope’s stage, the air-sacs started glowing blue. Credit Evan McKenzie Usage Restrictions None License Original 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.