United Press International: A 200-foot ice tunnel on a glacier in Argentina collapsed in a rare winter rupture some park wardens blamed on global warming. The collapse on the Perito Moreno Glacier in the Los Glaciares National Park in the Patagonian province of Santa Cruz was “the first time the glacier has broken up in the wintertime,” park warden Carlos Corvalan told London’s The Telegraph newspaper. The glacier, an important tourist attraction, collapses into Lake Argentino every two to 10 years due to …