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because adult stem cells are already differentiated cells, they can only become what they already are..thus they are successful in blood, etc. they do not have the potential to become the many other cells needed in the hopeful but very early stage research many of us would like to see proceed, with caution. indeed, adult stem cells are successful and thank goodness. this does not mean they can do it all. research with oversight in the area of nuclear transfer is essential we are talking about eggs here folks..not fertilized... maxine ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn