Irazu Volcano (image) University of Tennessee at Knoxville Share Print E-Mail Caption Microbiology professor Karen Lloyd (second from right) and Ph.D. student Katie Fullerton (far left) look at a volcanic wall while on a research trip to Costa Rica. Location: Irazu Volcano. Credit Photo by Tom Owens. Usage Restrictions None Share Print E-Mail 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.