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John B. Gurdon, 92, Dies; Nobelist Paved Way for Cloning of Animals

His work in the manipulation of cells laid the foundation for stem cell biology and regenerative medicine and led to the first cloned large mammal, a sheep named Dolly.

© Agence France-Presse — Getty Images

Dr. John B. Gurdon in 2012, the year he shared the Nobel Prize in Medicine or Physiology. When he was a teenager, a teacher tried to dissuade him from pursuing science.
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