Adult Stem Cells: A Piece of My Heart, From Cells in My Arm

I left my heart in Minnesota -- a tiny, pulsing piece of it, anyway. The folks at the Mayo Clinic call it "Lil' Bill" and it lives in a comfortable Petri dish on a climate-controlled shelf deep in the bowels of the renowned hospital. Each day it is taken out for care and feeding and very smart people carefully check to make sure it is growing bigger and stronger by the hour. Chances are remote that Lil' Bill will ever join its genetic brethren in my chest, but the fact that I can peer...Full Story