Scientists have concluded that the massive Pine Island Glacier is melting irreversibly. This is likely caused by warm ocean bottom waters, causing the grounded ice sheet to seperate from the floating ice shelf.
By News Desk
NewsHour interviews Jo Davies about her Antarctic expedition.
On July 8, NASA satellite imagery showed about 40 percent of Greenland's top ice layer intact. By July 12, only four days later, 97 percent of the ice had melted. Margaret Warner asks NASA's Thomas Wagner for scientific explanation of…
An international team of researchers has found more than 700 new species in the extreme depths of Antarctica's Weddell Sea, surprising scientists who had thought the region was largely devoid of life.
By PBS NewsHour
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