Scottish Scientists Crack Cloning

On February 22 1997, Scottish scientists broke their silence, revealing that they had successfully cloned adult sheep DNA. Dolly, who was born seven months earlier in July 1996, was the first successful cloning of a mammal from an adult cell. Created by scientists at the Roslin Institute in Edinburgh, Dolly lived to be six years old. Her birth was one of the most significant scientific breakthroughs of the 1990s and ignited a long-running debate over the ethics of cloning, particularly human cloning.