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Stem Cells

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Stem Cells

Stem Cells

Stem Cells

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  • <iframe src="https://www.npr.org/player/embed/1128391/128391" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

NPR's Richard Knox reports that researchers are trying to figure out which of the 60 or so human stem cell lines approved by President Bush will actually be useful. It isn't yet clear how many of the lines possess the key attribute of stem cells: The ability to develop into any of the hundreds of types of cells in the human body.

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