Colonies collapsing due to fungus-virus combination
                                
                                
                                    (Newser) -
                                    For years, experts have been trying to figure out what is killing all the honeybees—and they may finally have an answer. Since 2006, 20% to 40% of US bee colonies have collapsed, and suspected causes have included  genetically modified corn ,  pesticides , and  bad weather . New research, however, points to...