Cave (IMAGE) BMC (BioMed Central) Caption A cave. Credit Yolanda Lopez Vidal and Gonzalo Castillo-Rojas Usage Restrictions Please credit Yolanda Lopez Vidal and Gonzalo Castillo-Rojas 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.