Truly meaningful product news in the world of sunglasses comes few and far between. Often, years go by in between impactful product releases. Sunglass makers do their best to fill the gaps in between, mostly by releasing new styles and frame designs. While frame construction definitely matters — frames play a big role in fit, comfort, coverage, durability and more — lenses are the real engine of every pair of quality sunglasses on the market.

Dozens of once-pristine rivers and streams in Alaska’s Brooks Range are turning an alarming shade of orange. The discoloration, according to a new study published in the journal Communications Earth and Environment, is likely caused by the thawing of permafrost, which is exposing previously frozen minerals that are now leaching into the waterways.