Mine water flowing into the River Ystwyth (IMAGE) University of Exeter Caption Mine water flowing into the River Ystwyth Credit Daniel Osmond Usage Restrictions This image may only be used with reports of this research 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.