Pollution Gave Yellowstone’s Thermal Springs Unique Color

December 22, 2014 3:06 PM

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Yellowstone’s thermal springs attract millions of visitors every year. The simmering ponds with their vivid colors have thrilled visitors for decades. But scientists have found that, many years ago, these thermal springs were not the color they are today. Now they often take green, blue, yellow and red colors depending on when you are observing them. Researchers have found that it was a pond of deep blue color long before Yellowstone was made a national park in 1872..

In a study led by Paul W. Nugent of Montana State University, researchers provided scientific evidence to back up their claims that pollution is responsible for the fluorescent colors of Yellowstone’s thermal springs. Findings of the study were published in the journal Applied Optics. Nugent and his...

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