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Potential of Human Clone Draws Skeptics Cloning an animal is a tedious and difficult process, as shown by six calves cloned by scientists at the U.S. Agriculture Department. So many observers are skeptical of claims of an imminent human clone. NPR's Joe Palca reports.

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Potential of Human Clone Draws Skeptics

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Potential of Human Clone Draws Skeptics

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Cloning an animal is a tedious and difficult process, as shown by six calves cloned by scientists at the U.S. Agriculture Department. So many observers are skeptical of claims of an imminent human clone. NPR's Joe Palca reports.