As National Park Week continues, we"re turning our attention to the vivid colors of the Grand Prismatic Spring in Yellowstone National Park. Its intense rainbow hues are formed by cycles of hot water rising, cooling, and falling—creating rings of distinct temperatures inside the spring. The clear, blue center is the hottest part, with almost nothing living in it. But the other rings are home to various microorganisms that produce bands of distinct colors ranging from green to orange to red.
Where do those colors come from?
Today in History
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This park is Superkilen
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Take the Stairs Day
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Welcome to the drainpipe of the Pacific
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Purple flowers and Golden Week
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Wartburg Castle overlooking Thuringian Forest in Germany
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Infinity Day
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Lighting the way to new beginnings
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Mysterious prairie mounds abound
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Borrego Badlands
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Winter scenery near Kuhmo, Finland
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Crescent Lake near Dunhuang, China
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Stuben am Arlberg, Austria
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Observing World Braille Day in Bavaria
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Sunny day, sweepin the clouds away
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Think deep thoughts
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Old underground cellar, Bavaria, Germany
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Alaska National Interest Lands Conservation Act marks 42 years
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Corkscrew Swamp Sanctuary
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Bournemouth beach huts
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Go climb a tree
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Where fire meets water
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Great Fountain Geyser, Yellowstone National Park, Wyoming
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Cumberland Island National Seashore
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Cherry blossoms at the National Mall, Washington, DC
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Gardens by the Bay nature park, Singapore
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Nomads of the Gobi
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San Francisco Bay salt flats
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Trevi in bloom
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Przewalskis horses, Hustai National Park, Mongolia
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Languid life on the Lakes