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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‘You should see the one that got away!’
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World Water Day
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National Find a Rainbow Day
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Let the games begin
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Río Negro, Amazon basin, Brazil
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Gulf Islands National Seashore, Florida
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Spring equinox
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Bandon Beach in Bandon, Oregon
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Think deep thoughts
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Rainbow River, Rainbow Springs State Park, Florida
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Extraterrestrial Culture Day
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75th anniversary of the Spruce Goose
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Fiddlehead fern fronds
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Big Bend National Park in Texas turns 81
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The dancing trees of Sumba Island
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In the Red Sea for World Dolphin Day
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Happy Easter!
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International Polar Bear Day
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World Octopus Day
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Vote!
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Birch trees, Drammen, Norway
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Crescent Lake near Dunhuang, China
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World Book Day
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Cecropia leaf and lobster claw petals in Mexico
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Spring blooms in the Netherlands
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Taj Mahal, Agra, Uttar Pradesh, India
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Shark Fin Cove, California
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Merry and bright
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Daylight saving time begins
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National Garden Week begins today
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