Yale Environment 360: Greenland's Jakobshavn Glacier is flowing into the ocean at a record pace of more than 17 kilometers per year, according to research by U.S. and German scientists. The glacier, which drains 6 percent of the massive Greenland ice sheet, moved at a rate of 46 meters per day in the summer of 2012 four times the glacier's 1990s summer pace. The unprecedented speed appears to be the fastest ever recorded for any glacier or ice stream in Greenland or Antarctica, the researchers report in the journal...