Up to 1,000 gallons of water used in mining operations reached a creek and tundra, as an estimated 400,000 gallons spilled into containment areas and a gravel road.

The multinational company that operates the Red Dog Mine in Northwest Alaska says that thawing permafrost linked to global warming has forced it to spend nearly $20 million to manage its water storage and discharge.

With caribou herds in decline and migration patterns swaying in recent years, news that caribou are following a more traditional migration route near Kivalina and Noatak caused a buzz this fall.