Mountain, Soil, Land, Ground, Sand, Eruption, Tree, Plant, Nature, Volcano, nature, hot spring, micro organism, micro-organism, yellowstone national park, natural beauty, natural condition, nature detail, nature lovers, Water, Outdoors
Life on the Edge The billions of colorful microorganisms lining this hot spring's runoff channels are called "extremophiles" because they live in conditions that were once thought to be too extreme to host life. Extremophiles that live in hot springs are called "thermophiles" - Heat lovers.