Dr Erin Walsh (IMAGE) Australian National University Caption Dr Erin Walsh. Credit: Jamie Kidston/ANU Credit Credit: Jamie Kidston/ANU Usage Restrictions Credit: Jamie Kidston/ANU 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.