The Case For Cloning

The benefits of this bold technique outweigh the risks, and the danger is not what you think

An elderly man develops macular degeneration, a disease that destroys vision. To bolster his failing eyesight, he receives a transplant of healthy retinal tissue--cloned from his own cells and cultivated in a lab dish.

A baby girl is born free of the gene that causes Tay-Sachs disease, even though both her parents are carriers. The reason? In the embryonic cell from which she was cloned, the flawed gene was replaced with normal DNA.

These futuristic scenarios are not now part of the debate over human cloning, but they should be. Spurred by the fear that maverick physicist Richard Seed, or someone...

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