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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Digging the birds
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Antarctica Day
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Daintree Rainforest and Noah Beach, Queensland, Australia
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Cherry blossoms in Shanghai, China
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There’s treasure in them thar hills
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Brown bears, Katmai National Park and Preserve, Alaska
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Pi Day
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Badlands National Parks 45th anniversary
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Westerheversand Lighthouse
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Put your helmet on, we’re going for a hike
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World Bee Day
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World Chocolate Day
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Let s get lost
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World Octopus Day
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Celebrating the first day of spring
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Dunes at White Sands National Park, New Mexico
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Why’s it called a spelling ‘bee,’ anyhow?
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International Museum Day
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A festival of colors
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The Great Blue Hole, Belize
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Mid-Autumn Festival
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It’s surströmming time
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Cousins Day
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The long and wiggling path
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Mada’in Saleh archeological site in Saudi Arabia
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An uncommonly cool critter
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Celebrating 200 years of statehood
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Fujian Tulou, China
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Whale hello there!
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Monarch butterflies in Angangueo, Mexico
Bing Wallpaper Gallery

