The Arctic tundra is changing so fast that it is speeding up the climate crisis, top scientists say

Paul Ollig/National Park Service via AP

• 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 invasions to giant holes, drastic changes in the Arctic are affecting the entire planet.

From Alaska to Siberia, the Arctic...