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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Tree of many colors
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Gazing upon Portraits of Change
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National Gardening Week
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A species worth defending
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Happy Cinco de Mayo!
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A black heron canopy feeding in Botswana
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Feature Attraction: 85 years at the drive-in
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Wind Cave National Park celebrates 120 years
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Great white egret, Upper Bavaria, Germany
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Navy Pier, Chicago, Illinois
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Gemsbok in Namibian sand dunes
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Dragon dance performed in Chenzhou, Hunan Province, China
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Knuthöjdsmossen, a nature reserve in Sweden
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Vasco da Gama Bridge, Lisbon, Portugal
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Spring awakens
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Rocks on the move
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Happy winter solstice!
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Arbor Day
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A rest stop for the birds
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Bohemian waxwings in Canada
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Did they forget to fly south?
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Road-trip worthy attraction in the heartland
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Methoni Castle, Messenia, Greece
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Pollinator Week
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Dragons Eye, Uttakleiv Beach, Norway
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National Fossil Day
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World Nature Conservation Day
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Paradise Cave, Phong Nha-Ke Bang National Park, Vietnam
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World Maritime Day
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Friendship Day
Bing Wallpaper Gallery

