The Story of Dolly the Cloned Sheep | Retro Report | The New York Times
The scientific legacy of Dolly the sheep
She was the first artificially cloned mammal in history. Dolly was made from a nucleus of an adult somatic cell which was injected into an unfertilized egg. The egg had its own nucleus removed. Doly lived six years, which was bellow average for her breed. According to the scientists, her early dead was not caused by her unusual origin.