As the cloning debate rages in Washington, there is news from the scientific frontier. It involves cows, but tomorrow it could easily involve humans.
Scientists at Advanced Cell Technology in Worcester, Mass., took a skin cell from Cow A, cloned it (by injecting the nucleus into a cow egg whose nucleus had been removed), then implanted the embryo in the uterus of Cow B. That embryo clone grew into a fetus, which, had it been born, would have been Cow C. But it was not born. The fetus was removed from the uterus and harvested for its tissues. These tissues from...
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