Antarctica's Larsen Ice Shelf is disappearing section by section. A fast-growing rift, one of the largest ever seen, is now teetering on the edge of breaking away from the glacier. Science correspondent Miles O’Brien explores how scientists have tracked the…
By Miles O'Brien
The West Antarctic ice sheet holds enough water to raise the world’s oceans an estimated 10 feet -- and it’s shrinking.
By Julia Griffin
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.
An ash plume from an erupting glacial volcano in Iceland continues to cause problems for airports worldwide. Ray Suarez reports from London on the dangers the volcanic ash poses for air travel.
In Wednesday's other news, the House approved a $400 billion spending bill for the current fiscal year and Homeland Security Secretary Janet Napolitano said the government will miss a 2012 deadline for screening freight for radiological and nuclear material.
By PBS NewsHour
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.
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