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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National Park Service Founders Day
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The perfect canvas for an ancient text
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Welcome to the Hoh
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International Zebra Day
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Longer days mean warmer sand
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World Maritime Day
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The ‘Night of Nights’
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Welcome to my neck of the woods
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Harvest time in the Palouse
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Getting to the bottom of the underwater waterfall
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In the path of the pronghorn
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Cinco de Mayo
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What s better than a smile?
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I m here! Take a look at me!
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Celebrating Pie Day is as easy as, well…
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South Beach in Miami Beach, Florida
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Bird s-eye view on World Environment Day
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A summertime light show
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A march toward a dream
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Happy Astronomy Day!
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The Cutty Sark turns 150
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Looking down upon Edinburgh
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The dry days of winter in Etosha
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Tigh Mor Trossachs on Loch Achray, Scotland
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Christmas Tree Point Road and Twin Peaks, San Francisco
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Aerial view of the Colorado River Delta in Mexico
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Climb a tree for wild animals and plants
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Great hornbill, Thailand
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Mountain goats at Glacier National Park in Montana
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Take this for a spin...