An orange tributary of Alaska's Kugororuk River Josh Koch, U.S. Geological Survey Some of the water samples had a pH of 2.3, compared to an average pH of 8 for rivers, which means the impacted ...

Rivers and streams in Alaska are changing color – from a clean, clear blue to a rusty orange – because of the toxic metals released by thawing permafrost, according to a new study.

It was a cloudy July afternoon in Alaska's Kobuk Valley National Park, part of the biggest stretch of protected wilderness in the U.S. We were 95 kilometers (60 miles) from the nearest village and ...

An orange tributary of the Kugororuk River is pictured in Alaska. Scientists are trying to find out why rivers and streams across Alaska's Arctic are turning a rusty orange color.

Thawing permafrost may be turning clear water in some of Alaska’s remote watersheds into a dusty, murky orange. As the frozen layer of soil melts, minerals become exposed and seep into the water ...

Alaska's melting permafrost is dumping toxic metals into the state's rivers, turning them bright orange and making the water highly acidic. The contaminated rivers are so vibrant they can be seen ...

Rivers and streams in Alaska are changing color – from a clean, clear blue to a rusty orange – because of the toxic metals released by thawing permafrost, according to a new study.

Climate change is probably causing dozens of rivers in Alaska to flow orange, and it could have disastrous, cascading consequences on the state’s ecology and rural communities, researchers said ...

Alaska's rivers and streams are becoming toxic as a strange "milky orange" color stains their waters, a new study has found. The research from the National Park Service, U.S. Geological Survey ...

Rivers and streams in Alaska are changing color – from a clean, clear blue to a rusty orange – because of the toxic metals released by thawing permafrost, according to a new study.

A n ecological nightmare is unfolding in the largest US state by land area, Alaska as several of its rivers turn bright orange. The alarming sight, which is also visible from space, is a matter of ...

Rivers and streams in Alaska are changing color – from a clean, clear blue to a rusty orange – because of the toxic metals released by thawing permafrost, according to a new study.