LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY
Ian Wilmut and Dolly. In 1996, British embryologist Professor Ian Wilmut created "Dolly", the world's first sheep cloned from an adult sheep cell. The research was conducted at the Roslin Institute in Edinburgh, Scotland. The cell nucleus was removed from an egg cell taken from a Scottish Blackface ewe. Next, an adult cell from the udder of a 6-year-old Finn Dorset ewe was cultured and injected into the enucleated egg cell. A spark of electricity then fused the udder cell with the egg cytoplasm and stimulated the egg to grow into an embryo in the womb of a surrogate sheep. Photographed at Edinburgh's Royal Museum, where Dolly has been displayed since her death in 2003.
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