But they're not particularly vulnerable at 27, researcher notes
                                
                                
                                    (Newser) -
                                    The idea that rock stars die young is actually true, according to a new study out of Australia. Though most rock stars don't enter the so-called "27 Club," whose members all died at that age (Kurt Cobain, Jimi Hendrix, Janis Joplin,  Amy Winehouse , Jim Morrison), the study...