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Este cientista soviético realizou 23 experimentos falhos até conseguir criar um “cachorro de duas cabeças“. Em 1959, ele costurou a cabeça de um cão menor em outro maior, conectando também seus sistemas circulatórios e vértebras. O animal viveu por 4 dias após a cirurgia e o caso é debatido até hoje pelas questões éticas envolvidas.
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