"Preserve Yellowstone The National Park Service works to preserve Yellowstone for the enjoyment, education, and inspiration of all people. We are not alone in this endeavor—park partners, volunteers, and visitors all help. Life in Extreme Heat Hydrothermal features are habitats for microscopic organisms called thermophiles: 'thermo' for heat, 'phile' for lover. https://www.nps.gov/yell/index.htm"

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