Illustration. (IMAGE) University of Tokyo Caption Too much sun in cold temperatures cannot be processed and instead causes harmful, reactive chemicals to form. This damages the marimo’s ability to photosynthesize and repair itself. Credit 2022 Akina Obara Usage Restrictions Credit must be given to the creator. License CC BY 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.