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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Okavango Delta, Botswana
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Fly me to the moon
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Mackerel forming a bait ball to avoid predators
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Hanging out on a limb
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Life goes on at the Beatles Ashram
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Lionfish off the coast of Indonesia
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Night of the ‘Cold Moon’
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Málaga, Spain
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Bardenas Reales Biosphere Reserve and Natural Park, Spain
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Room at the top?
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A hermitage with a view
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International Moon Day
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Reflecting on fall
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World Frog Day
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Merry and bright
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Sea Otter Awareness Week
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Waiānapanapa State Park, Maui, Hawaii
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A cliffside harbor in Sardinia
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Cheese! We ll go somewhere where there s cheese!
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Wartburg Castle overlooking Thuringian Forest in Germany
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Cenote near Puerto Aventuras, Mexico
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Square Tower House in Mesa Verde National Park
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Over and under the delta
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World Bee Day
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Fin whales: A success story
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Happy Pi Day!
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Old Town of Rovinj, Croatia
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Churún Merú waterfall in Venezuela
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National Blueberry Day
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Squirrel Appreciation Day