Michael Cook | Saturday, 8 September 2007 A new challenge for human dignity Britain's fertility regulator has just approved the creation of human-animal embryos for research. What's next? The creation of hybrid human-animal embryos for medical research, which has just been approved by the British government's fertility watchdog, pushes the needle on the "yuck factor" meter far into the red. But even more "yuck" is the deception and manipulation used to justify the decision. In the United Kingdom, experiments with embryos are closely regulated by the Human Fertilisation and Embryology Authority. So when scientists began to lobby for the...