The biggest ever study of Arctic pollutants paints a picture of an ecosystem under siege—with potentially grave consequences for denizens of Earth’s northernmost reaches.

Thirty minutes before the plane touches down in Koryazhma, a Russian mill town of 44,000 built by prisoners sent to operate the Kotlas plant when it opened in 1961, clear …

U.S.-origin spent nuclear fuel – otherwise known as nuclear waste – has been piling up around the world waiting for a country willing to take it. Russian nuclear agency MINATOM …