Alaska's once crystal-clear rivers now resemble dirty orange soda, puzzling researchers

Alaska's once crystal-clear rivers now resemble dirty orange soda, puzzling researchers

A stream tributary of the Akillik River in Kobuk Valley National Park, Alaska, turned orange.Jon O'Donnell/National Park Service <ul><li>Researchers noticed that Alaskan streams had turned bright or… [+4142 chars]

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