Do you know how the cloning of the Dolly lamb happened?

Scottish scientists announced on February 22, 1997, the successful cloning of a lamb, Dolly, with the contribution of three mothers, one with eggs, the other with AND, and the third had kept the cloned embryo on its fetus.

Science presented Dolly as the achievement of the year. Dolly lived at the Rosley Institute in Edinburgh, Scotland, and even had six lambs.

Dolly was moved by arthritis, and on February 14, 2003, she was put to sleep to death because of progressive lung disease. The cloning of mammals (a group of human beings) has proved extremely inefficient. Dolly was the only one among the 277 attempts that survived and reached the age of 6, although Chinese scientists reported success in cloning pigs in 2014.

The scientists who cloned Dolly announced in 2007 that the technique used in Dolly's case cannot be effective for human access.