Tree rings in the fossilized Wataria (IMAGE) Hokkaido University Caption Wataria parvipora showing annual rings. It is one of the characteristics that helped the scientists in identifying the wood-fossil. (Nishino et al., Scientific Reports, June 22, 2023) Credit Nishino et al., Scientific Reports, June 22, 2023 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.