Students Smiling (IMAGE) University of Tennessee at Knoxville Caption Psychologists at the University of Tennessee, Knoxville recently found that facial expressions (such as smiling) can have an impact in our emotions. Credit University of Tennessee 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.