Stressed Snail (image) University of Exeter Caption A snail study reveals that stress is bad for memory. New research on pond snails has revealed that high levels of stress can block memory processes. Credit Sarah Dalesman, University of Exeter Usage Restrictions None 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.