Cloning: Where Do We Draw the Line?

Researchers duplicate a human embryo, provoking cries that technology has gone too far

When it finally happened -- after years of ethical hand wringing and science- fiction fantasy -- it was done in such a low-key way by researchers so quiet and self-effacing that the world nearly missed it. The landmark experiment was reported by Jerry Hall at a meeting of the American Fertility Society in Montreal three weeks ago. Afterward, colleagues came up to congratulate him and say "Nice job." Others voted to give his paper, written with his supervisor, Dr. Robert Stillman, the conference's first prize. But nobody seemed to want to pursue the one fact that made his little experiment --...

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