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I've always been confused about this subject. Exactly what do they do to these fetuses from which they harvest these stem cells? What happens to them? What is the impact? At what point in their development are the cells taken? What, exactly, IS a stem cell?
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They are fetus' from abortions. because they're so underdeveloped, apparently, their cells can morph into any cell in the body by placing it next to one. From what I've heard, get enough stem cells, and you would be able to recreate entire limbs. In likeness to this topic, say you got your nose ripped off. With enough stem cells placed on your nose, it would eventually regenerate your nose.
Or, as shown in South Park, if you place stem cells next to a Shakey's Pizza Parlor, they will create another Shakey's Pizza parlor
I dunno why there has been controversy about it in the past. They're dead fetus', so why not put them to some use, instead of letting them rot?