Staff at a Danish zoo where a healthy giraffe was put down have received death threats as debate rages online over the killing, which took place despite a petition signed by thousands of animal lovers. Several staff members were targeted after the animal, named Marius, was shot Sunday, Copenhagen Zoo spokesman Tobias Stenbæk Bro told CNN on Monday. The Copenhagen Zoo said it "euthanized" Marius to avoid inbreeding. A veterinarian shot Marius with a rifle as he leaned down to munch on rye bread, a favorite snack. After an autopsy the giraffe was dismembered in front of an audience that...