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Seahawks fans celebrate at CenturyLink field during a 2013 home game.Photo by Flickr userPhilip Robertson Jumping up and down in one's living room to celebrate a touchdown pass hardly qualifies as seismic activity. Yet Monday night in Seattle's…

More than 300 miles north of the Arctic Circle, Alaska’s North Slope is ground zero for global climate change. NewsHour producer April Brown reports the melting ice has opened up opportunity for shipping and other development – industry that could…

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Comet ISON photographed via a telescope on November 8, 2013. Photo by Adam Block/Mount Lemmon SkyCenter/University of Arizona While Americans cook their Thanksgiving turkeys on Thursday, a tiny comet called ISON will pass 684,000 miles above the surface…