In recent years, the typical purples, blues and greens that color Alaska’s tundra ecosystems have been cut through with an unexpected hue as rivers run orange. The phenomenon was first widely noted by ...

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 ...

When scientists Patrick Sullivan and Roman Dial were heading to a remote area in the Brooks Range in 2019 to map the spread of woody plants there, they were looking forward to seeing a celebrated ...