Climate Central: When scientists saw melting across a whopping 97 percent of Greenland's icy surface last summer, they were quick to note that such an event is rare, but not unprecedented. The last time it happened was in 1889, so while manmade global warming is clearly involved it isn't necessarily the entire story.
A new new report in Nature on Wednesday has now helped flesh out the explanation: data from Summit Station, at the frozen island's highest point, 10,551 feet above sea level, show that unusually warm...