Here's What Yellowstone's Thermal Springs Looked Like Before Humans Visited

December 21, 2014 12:28 AM

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Tourists from all over the world flock to Yellowstone's geothermal pools, like Morning Glory (seen above), to witness their brilliant hues. But according to a new study, those same visitors completely changed the pools' appearance.

The study, by researchers from Montana State University, used a mathematical model to analyze measurements taken at geothermal pools across Yellowstone to reconstruct what the pools might have looked like before humans first set foot in the area.

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