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.

At least 75 of Alaska's waterways are turning orange in the summer, with some so acidic they're comparable to lemon or orange juice, researchers say.

But how, exactly, permafrost thaw is turning these rivers orange has been a mystery. Solving it is crucial for understanding what the sweeping ecological impact could be and to help communities ...

Experts Reveal Why Alaska’s Rivers Are Turning Bright Orange and It’s More Serious Than ... At least 75 of the Alaskan rivers have transformed into rusty waterways in the Brooks mountain ...

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 ...

This time, we are taken to Alaska, where scientists are alarmed over once pristine backcountry rivers turning from a brilliant glacier blue to a rusty bright orange. According to a study published ...

Clouds hang over the hills along the banks of the Yukon River on Aug. 21, 2014, in Yukon-Charley Rivers National Preserve. The Yukon River flows nearly 2,000 miles from Canada’s Yukon Territory ...