Christopher Chambers and Ralf Greve (IMAGE) Hokkaido University Caption Christopher Chambers (left) and Ralf Greve (right) (Photo: Ralf Greve). Credit Ralf Greve Usage Restrictions This image is copyrighted, but may be used to report 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.