Photo: Wolf Clones Real, Errors "Unintentional," Review Finds

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Veterinary professor Byeong-Chun Lee shows off two cloned gray wolf females at Seoul National University on March 26.

A review of Lee's work has validated the cloning successes while finding significant but "unintentional errors" arising from sloppy record keeping and handling of samples.

Photograph by Kim Mi-Ok/AFP/Getty Images

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