UK lawmakers approve bill allowing use of hybrid mice in stem cell research . `` The science is so weak and the ethical concerns are so significant Opponents describe controversial technique as ` ` deeply , deeply reprehensible '' Advocates say use of animal embryos helps prevent death of human embryos . Scientists say stem cells have potential to cure conditions such as Parkinson 's .
UK lawmakers approve bill allowing use of hybrid mice in stem cell research . Opponents describe controversial technique as ` ` deeply , deeply reprehensible '' Advocates say use of animal embryos helps prevent death of human embryos . Scientists say stem cells have potential to cure conditions such as Parkinson 's .