Those who know me know that I like science fiction. That's why I am reminded of this episode of Babylon 5. It's called "Deathwalker." The main idea is that a wanted war criminal walks onto the station and has the secret to immortality. Besides being wanted for war crimes by several species, it is found out that to make one vial of serum, and you have to kill another being. Some want to get their hands on it, but as the character and her vial of serum is transported, a very ancient race steps in and destroys it all saying, that we aren't ready for immortality. I look at the embryonic stem cells research in the same vein, what right do we have to pull apart any sentient being for us to gain immortality.