VICTOR DE SCHWANBERG / SCIENCE PHOTO LIBRARY VICTOR DE SCHWANBERG / SCIENCE PHOTO LIBRARY
Cloned cats. Conceptual image of an array of cats in glass jars, representing the cloning of pets. The first mammal to be cloned from an adult cell was Dolly the sheep, in 1996. The first cloning of a cat for commercial reasons took place in 2004. Some cloned pets have developed health problems.
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