CNN's Bill Weir joins scientists in the rapidly warming Arctic, where sea ice is at a record low, glaciers are shrinking, and wildlife is shifting. Meanwhile, global politics threaten the research needed most to understand the changes.
CNN's Bill Weir joins scientists in the rapidly warming Arctic, where sea ice is at a record low, glaciers are shrinking, and wildlife is shifting. Meanwhile, global politics threaten the research needed most to understand the changes.
