On an April 2010 canoe trip to Knife Lake, Minn., Steve Piragis of Ely, Minn. was greeted by this bull moose. (Indentations on the moose's head indicated that he had shed his antlers.) Sam Cook/Courtesy of Duluth News Tribune hide caption toggle caption Sam Cook/Courtesy of Duluth News Tribune The Two-Way Minnesota's Moose Mystery: What's Killing Them? February 7, 2013 In northeastern Minnesota, moose are dying at an alarming rate. State officials are having difficulty determining why. And though hunters are not part of the problem, the state announced Wednesday that there will be no moose hunting season this coming fall. Disease? Predators? Climate change?