In South Korea, a man's cells have been used to clone, creating stem cells that match his own body's cells. On the heals of an amazing scientific development, the ethical questions are bound to begin their circuits on both sides of the debate.
The ethical or lack of ethical challenges for me begin and end at taking a human life, when it comes to science. Improving humans, changing us, even cloning us doesn't seem to violate any particular belief I hold. It's scary, perhaps unnerving. Many Christians deplore farming stem cells from human fetuses because they believe unborn babies are humans and that their lives deserve the same respect as those outside the womb.