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
More Desktop Wallpapers:
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Nursing the world to health
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A truly American monument
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Andean cocks-of-the-rock, Ecuador
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Great Smoky Mountains National Park, Tennessee
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Wake up, it s Darwin Day
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A desert arts pop-up, just popped up
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Banggai cardinalfish with sea anemone
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Celebrating 54 years of Capitol Reef National Park
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Góða ólavsøku, from the Faroes!
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Happy Mothers Day!
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Up, up, and away for Hot Air Balloon Day
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Pretty in pink, and purple, and red…
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Keep your hands inside the ride at all times…
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Jupiter and the Galilean moons
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Fat Bear Week
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Saint Andrews Day
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Porcupine
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Water colors
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Jeju Island, South Korea
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World Meteorological Day
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Watson Lake in Granite Dells, Arizona
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Independence Day
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There was gold in them there hills…
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Moving as one
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Spring comes to Glacier National Park
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Menton, France
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Into the woods
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Summer solstice
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Groundhog Day
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A storied trail marks a century
Bing Wallpaper Gallery

