In The Embryonic Stage: THE STEM-CELL DEBATE


President Bush seemed to have divided the stem-cell issue neatly last August. Stem cells, extracted from early-stage embryos, can develop into any of the body's cells and show great promise against myriad diseases. But some think this research, which kills the embryos in the process, is immoral. Bush decided to allow federal money for research on the 64 lines of stem cells that had already been developed but cut off funding for any new lines.

He did not cut off the controversy. Says Irving Weissman, a stem-cell biologist at Stanford: "I don't think anybody believes the debate is over." It only...

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