UK lawmakers approve bill allowing use of hybrid embryos in stem cell research . Opponents describe controversial technique as `` deeply , deeply reprehensible '' Advocates say use of animal embryos helps overcome shortage of human embryos . Score: 6
UK lawmakers approve bill allowing use of hybrid embryos in stem cell research . Opponents describe controversial technique as `` deeply , deeply reprehensible '' Advocates say use of animal embryos helps overcome shortage of human embryos . Scientists say stem cells have potential to cure conditions such as Parkinson 's .