Whales reveal impact of Greenland's melting ice on oceans.

The disappearance of North Atlantic right whales from the Gulf of Maine is linked to deeper shifts in the ocean caused by climate change, which may be connected to the melting of Greenland's ice sheet. With only about 340 animals left, the species is at risk of extinction as many of the whales are swimming hundreds of miles farther to Canadian waters instead, putting them in new danger.