The original thinking regarding embryonic stem cells was arrived at back befor we understood much about the immune system or how our genetic systems work. The proponents actually argued that embryonic stem cells were not yet "patterned on an individual" so they'd just enter our own systems "unnoticed" (I believe that was the term).
Research demonstrated that believe to be total BS. Our bodies have immune systems that'll attack inert substances even!
Anyone who does little more scientific research than read Science News bi-weekly knows more about it than Mary Anne Fox.
The fact that she continues to pump for embryonic stem cells rather demonstrates something many people know from other lines of evidence ~ she's a moon bat with pretensions of becoming a witch if people would just get out of her way.
The woman is certifiable.
Something is really wrong with our society if such people can exercise such power and have influence in so many places.
Maybe we oughtta' let Obama destoy the rich ~ just burn 'em out like maggots ~
Once again, for those who watched Obama, and want to wash their brains out with soap, here a video of a REAL PRESIDENT giving a commencement speech at Notre Dame:
http://www.youtube.com/watch?v=P0EDIQ5uEEo