number of chromosomes

Face-Off: Titans of Cloning

In this corner: Gregory Stock, director of the program on Medicine, Technology and Society at UCLA. and in this corner: Panos Zavos, professor emeritus of reproductive physiology at the University of Kentucky.

On February 4, Zavos revealed that the cloned embryo he purportedly transferred into a woman's uterus failed to implant. Stock believes clones aren't far off, but says Zavos isn't legit. Here, a discussion just hours before Zavos told the British press there's no baby.

Stock: The only reason Zavos made a cloning announcement is for publicity, just like the Ralians.

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