Asmerom points (IMAGE) University of New Mexico Caption UNM Distinguished Professor Yemane Asmerom points to phreatic overgrowth on speleothem (POS). Credit UNM Usage Restrictions None 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.