The Arctic is rapidly changing from the climate crisis, with no "new normal," scientists warn. Wildfires and permafrost thaw are making the tundra emit more carbon than it absorbs. From beaver ...

The news that the frigid Arctic tundra ringing the polar region has switched from being a net absorber, or "sink," of planet-warming greenhouse gases to a net emitter, or "source," indicates the ...

The Arctic can feel like a far-off place, disconnected from daily life if you aren’t one of the 4 million people who live there. Yet, the changes underway in the Arctic as temperatures rise can ...

Green summer tundra and the rolling Mulgrave Hills in northwestern Alaska's Cape Krusenstern National Monument are seen on July 11, 2011. The Mulgrave Hills are the farthest west extension of the ...

Foreboding environmental milestones abounded again this year in the Arctic, where experts say dramatic climate shifts are fundamentally altering the ecosystem and how it operates. One recent turning ...