Whale Migration Clues Discovered Across Thousands of Miles

The disappearance of North Atlantic right whales from their usual feeding grounds in the Gulf of Maine has been linked to a chain reaction in the ocean caused by climate change. Scientists have traced the shift to the world's second-largest ice sheet, sitting on top of Greenland, which is melting due to rising temperatures. This is part of a series from NPR's climate desk on the interconnectedness of ice around the world.