The above image isn't a heat map, despite its bright colors. Instead, it's a photograph of Kutuk River in Gates of the Arctic, a vast national park in the remote northern region of Alaska.

Alaska's Rivers Are Turning Orange and No One Knows Why Published Dec 21, 2023 at 11:17 AM EST Updated Dec 21, 2023 at 12:02 PM EST . By . Khaleda ...

It is known for its high-water quality, scenery, recreational opportunities, cold-water fishery, and historic and cultural significance.

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.

Normally, the rivers that run through Alaska are a pristine blue. But lately, there have been a number that look rusty—orange, even. It’s not pollution (well, not from any man-made source, at ...

In Alaska’s Arctic rivers alone reside a variety of fish that are “critical for subsistence, sport, and commercial fisheries,” researchers wrote.