Reef Coral growth rings (IMAGE) Hokkaido University Caption The growth rings of the reef coral on Con Dao Island investigated in this study, stretching from 2005 back to 1923 (Takaaki K. Watanabe, Tung Thanh Phan, et al. Scientific Reports. December 7, 2022). Credit Takaaki K. Watanabe, Tung Thanh Phan, et al. Scientific Reports. December 7, 2022 Usage Restrictions This image is copyrighted but may be used to report on this press release if credited as instructed. 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.