Associated Press: Perito Moreno, Argentina’s most famous glacier, has begun calving when one would least expect it – the Southern Hemisphere’s winter. Officials at the Los Glaciares National Park in Santa Cruz Province said there was no record of such an ice break during the winter months of June through August, although breaks during summer melts happen regularly. Park director Carlos Corvalan said the rupture, which began last Friday, could be caused by global warming. The Perito Moreno …