Cistern Spring (IMAGE) DOE/Oak Ridge National Laboratory Caption Cistern Spring in Yellowstone National Park is home to the elusive archaeon Nanopusillus acidilobi. Credit ORNL Usage Restrictions None 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.