<I>Galdieria sulphuraria</I> (IMAGE) U.S. National Science Foundation Caption This is a rock in an Icelandic hot spring near Reykjavik with sulfur and Galdieria sulphuraria. Credit Christine Oesterhelt 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.