Ryosuke Omori (IMAGE) Hokkaido University Caption Ryosuke Omori, corresponding author of the study. Credit Ryosuke Omori Usage Restrictions This image is copyrighted, but may be used to report the press release if credited as instructed. License Original 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.