Akihide Kasai and Yoh Yamashita (IMAGE) Hokkaido University Caption Akihide Kasai (yellow life jacket, left) and Yoh Yamashita (right), two of the co-PIs of the study (Photos: Akihide Kasai, Yoh Yamashita). Credit Akihide Kasai, Yoh Yamashita Usage Restrictions This image is copyrighted but may be used to report is 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.