Living organisms thrive in the acid hot springs of Norris Geyser Basin. The overflow channels of geysers and hot springs are colored with numerous microscopic life forms like this orange cyanobacteria found in the runoff streams in Porcelain Basin. These microscopic life forms are a focus for research in medical and criminal investigations. New tools for use in areas such as AIDS research and DNA “fingerprinting” have been developed from the microscopic thermal organisms found in Yellowstone’s hot springs. | 
