Two Blue Worms (IMAGE) Princeton University Caption As part of an experiment to assess learning and memory in C. elegans roundworms, the image on the left shows worms that have not yet been trained to associate food with a drop of the chemical butanone that has been placed on the right side of the Petri dish. After training, the worms in the image on the right can be seen clustering around butanone that has been added. By testing normal worms as well as worms with genetic mutations that increase lifespan, the researchers were able to explore how factors that extend longevity affect learning and memory. Credit Coleen Murphy lab 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.