The pristine Alaskan rivers face an unprecedented threat due to the climate crisis and researchers fear it will get only worse with time.

At least 75 of Alaska's brooks and streams have been turning a dirty orange likely due to thawing permafrost, with some rivers so impacted that the discoloration can be seen via satellite ...

Orange streams are increasingly common in northern Alaska.Credit ... of native Alaskans and the watersheds of several significant rivers, and could affect the quality of drinking water and ...