Xinhua: One ice shelf in Antarctica has completely disappeared and another two have lost massive sections, as glaciers there are melting more rapidly than previously known due to global warming, according to two separate studies on Friday. The U.S. Geological Survey (USGS) said in a report prepared in collaboration with the British Antarctic Survey that the Wordie Ice Shelf, which has been retreating in the past 40 years, is completely gone. Moreover, the northern part of the Larsen …