Geyser bacteria

Geyser bacteria are archaebacteria that are adapted to very extreme conditions, especially high acidity and high temperatures. Some species, for example, grow in concentrated sulfuric acid, while other species at 55° C. Geyser bacteria use sulfur as an energy source and carbon dioxide or organic compound as a carbon source. They are known from among others, geysers in Iceland, hot springs in the Yellowstone National Park in the United States (Wyoming) and hot deep-sea springs.