Cloning
Dolly, a Finn-Dorset ewe, was the first mammal to have been successfully cloned from an adult somatic cell. Dolly was formed by taking a cell from the udder of her 6-year old biological mother. Dolly's embryo was created by taking the cell and inserting it into a sheep ovum. It took 434 attempts before an embryo was successful. The embryo was then placed inside a female sheep that went through a normal pregnancy. She was cloned at the Roslin Institute in Scotland by British scientists Sir Ian Wilmut and Keith Campbell and lived there from her birth in 1996 until her death in 2003 when she was six. She was born on 5 July 1996 but not announced to the world until 22 February 1997. Her stuffed remains were placed at Edinburgh's Royal Museum, part of the National Museums of Scotland.
Robert Briggs (scientist)
Robert Briggs (December 10, 1911 — March 4, 1983) was a scientist who, in 1952, together with Thomas Joseph King, cloned a frog by nuclear transfer of embryonic cells. The same technique, using somatic cells, was later used to create Dolly the Sheep. Their experiment was the first successful nuclear transplantation performed in metazoans. He was a scientist at the Institute for Cancer Research of the Lankenau Hospital Research Institute (now known as the Lankenau Institute for Medical Research) when the work was conducted.