It's the tale as old as time, "scientific progress" vs. "what's right." On the one hand, we have stem cells and other such biological and engineering works that could potentially improve life for mankind drastically, cure diseases, make man stronger, more versatile...man can literally improve his design. But then you have the other side, and the powerful question, "Who are WE to play God and alter such things?" Should we be afraid of "playing God?" Is there a line? If so, what?