Nobel Intent: Maybe we don't need embryonic stem cells after all:
"Embryonic stem cells (ESCs) have the potential to develop into any tissue, and thus hold promise for repair of damaged organs. Part of that potential comes from being a perfect tissue match to the person in need of repair, but this assumes that ESCs can be made from adults, a process that currently requires using a process that's disturbingly close to human cloning. The alternatives, however, are also problematic. Human ESCs exist, but they will not be perfect matches to patients, and there are restrictions on working with them while using government funding and some ethical concerns regarding their creation. Although adult stem cells exist, they are partly specified, and may not be able to form every tissue that needs repair. In addition, some adult stem cells exist in small populations that reside in hard-to-reach locations—nobody's going to dig around in the heart or interior of the brain of a patient in order to pull out a few stem cells."
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