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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Trullo buildings in Alberobello, Apulia, Italy
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Megalong Valley, Blue Mountains National Park, Australia
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Azaleas blooming on Hwangmaesan Mountain, South Korea
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International Jazz Day
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National Hummingbird Day
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Isla del Pescado on the Salar de Uyuni in Bolivia
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World Migratory Bird Day
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75 years of the United Nations
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Overlooking the Douro
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World Meteorological Day
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The birth of Bauhaus
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Summer solstice
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A throng of ice and spires
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A place fit for the gods
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Patriot Day
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Antarctica Day
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Spring comes to Glacier National Park
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Let s run em up!
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International Whale Shark Day
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Waiting for the perfect shot
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Point Reyes National Seashore
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Everglades National Park turns 75
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Spot on for International Cat Day
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International Moon Day
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Stari Most in Mostar, Bosnia and Herzegovina
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Mesquite Flat Sand Dunes in Death Valley National Park, California
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Once upon a midafternoon dreary…
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Mountain goats
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Three Musketeers Falls at Iguazú Falls, Argentina
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In the Navajo Nation for Code Talkers Day
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