Japanese worried projectiles could injure or kill someone
                                
                                
                                    (Newser) -
                                    Conservationists chucked paintballs and rotten butter at Japanese whalers, while the whalers fired back with water canons in their latest pitched, if unconventional, naval battle in the Antarctic Ocean yesterday. No one was injured in the clash, the  AP  reports. Paintballs are a new weapon for the Sea Shepherd group,...