Vale Telheiro. (IMAGE) Faculty of Sciences of the University of Lisbon Caption Vale Telheiro, the Portuguese cave which was part of this study and is a global hotspot of underground biodiversity. Credit Ana Sofia Reboleira. Usage Restrictions Attribution is required. 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.