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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International Literacy Day
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Ayutthaya Historical Park, Thailand
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Grandparents Day
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Women s suffrage at 100
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Bohemian Switzerland
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Penguin Awareness Day
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Beavers Bend
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World Otter Day
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Santa Claus Village in Rovaniemi, Lapland, Finland
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Gentoo penguins in Antarctica
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‘The memory of Abraham Lincoln is enshrined forever’
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Patriot Day
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International Day of the Snow Leopard
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Endangered Species Day
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30 years after Exxon Valdez
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Fannette Island, Lake Tahoe
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The city of Osaka at night, Japan
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The Cordillera de la Sal in the Cordillera Domeyko Range of Chile
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Valentines Day
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Katahdin Woods and Waters National Monument anniversary
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Great horned owl
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Lupine fields, Snæfellsnes, Iceland
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Menton, France
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Avalanche Lake Trail at Adirondack High Peaks, New York
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Art over Amalfi
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Astrotourism at its finest
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North Sea at sunset, Norddorf, Germany
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Smithsonian Secretary Lonnie Bunch on the institution s 175th anniversary
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Happy Boxing Day!
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Deep in the North Woods wetlands
Bing Wallpaper Gallery

