Most of the scientists who gathered in Washington earlier this month to talk about human cloning agreed that cloning an entire human being--besides being morally questionable--was fraught with technical obstacles. After all, research into animal cloning has already shown that for every apparent success like Dolly the sheep, there are hundreds of failures, including many badly deformed creatures that were usually miscarried.
Now comes word that it might be easier to clone humans than was previously believed. According to research at Duke University, people have a genetic quirk that might prevent some of the developmental deformities associated with animal cloning. "That...