Atomic Butterfly (image) University of Vienna Caption Key components for the success of the study were the combination of ultra high vacuum and low acceleration voltage. Credit (Copyright: University of Vienna) Usage Restrictions The image may only be used with appropriate caption or credit. 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.