No clear answer for the loss of Ellen Chung, Jonathan Gerrish, daughter, and dog
                                
                                
                                    (Newser) -
                                    A family that  died on a hike  in California's Sierra National Forest in August did not die by  lightning strike , by any weapon, illegal drugs or alcohol, carbon monoxide, carbon dioxide, cyanide exposure, or by suicide, investigators publicly concluded Thursday. But what did kill Ellen Chung, 31; Jonathan Gerrish,...