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
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FOR FOREST by Klaus Littmann
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The birthplace of a classic Christmas carol
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Lake Fyans, Grampians National Park, Victoria, Australia
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Guild houses of Grand-Place, Brussels, Belgium
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A tribute to the ancestors
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Mount Fuji on Honshu Island, Japan
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Santorini, Greece
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Hay bales in North Yorkshire, England
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An inland ocean
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Dunluce Castle, County Antrim, Northern Ireland
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A treaty for science
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World Otter Day
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Observing a squirrelly day
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A star blows a bubble
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Hidden beauty in Thailand
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Zion National Park, Utah
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Oud-West, Amsterdam, Netherlands
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World Penguin Day
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An impactful day
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Happy Pi Day!
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World Wildlife Day
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American bison
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Highway through Xitai Jinaier Lake, Qinghai Province, China
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National Public Lands Day
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Irohazaka road
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Plitvice Lakes National Park, Croatia
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International Museum Day
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Navy Pier, Chicago, Illinois
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Talampaya National Park, Argentina
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International Infinity Day
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