Dr Tristan Salles (IMAGE) University of Sydney Caption Lead author Dr Tristan Salles from the School of Geosciences at the University of Sydney. Credit Stefanie Zingsheim, The University of Sydney Usage Restrictions For this story only 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.