A section of Nome Creek in the White Mountains National Recreation Area, seen in June, shows how historic placer mining, which dredged much of the waterway, molded the bank into a scalloped rock wall.

Dozens of Alaska’s most remote streams and rivers are turning from a crystal clear blue into a cloudy orange, and the staining could be the result of minerals exposed by thawing permafrost, new ...

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. The finding ...

During these late winter days, researchers who are studying the rusty discoloration of northern Alaska streams are prepping for summer field trips. Jon O’Donnell of the National Park Service is one of ...

Add Yahoo as a preferred source to see more of our stories on Google. A section of Nome Creek in the White Mountains National Recreation Area, seen in June, shows how historic placer mining, which ...

An aerial view of the rust-colored Kutuk River in Gates of the Arctic National Park in Alaska. Thawing permafrost is exposing minerals to weathering, increasing the acidity of the water, which ...

During these late winter days, researchers who are studying the rusty discoloration of northern Alaska streams are prepping for summer field trips. Jon O’Donnell of the National Park Service is one of ...