I just don’t understand the other side’s argument. Adult stem cells are not a substitute for embryonic stem cells, at least not yet. The anti-stem cell research crowd wants to claim that we don’t need ES cells, that AS cells will do everything we need, but they don’t think it through. If we want to make AS cells that are functionally equivalent to ES cells, we need to understand ES cells—but they want to deny us the ability to look at ES cells. Furthermore, if we could convert an AS cell line to totipotency what we’d have is…millions of cells we could replicate in the lab, each of which has the potential to become a human being. We’d go from a few “snowflakes” to a blizzard. Then what?