Shells Scan (IMAGE) University of Plymouth Caption A heat-map demonstrating where differences are most likely to occur in shell shape among gastropods exposed to raised CO2 levels (with red indicating a greater degree of change) Credit Ben Harvey 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.