Where did Dolly the sheep come from?

Dolly the sheep was the first mammal to be cloned from an adult somatic cell. She was cloned near Edinburgh by Ian Wilmut, Keith Campbell and their colleagues at the Roslin Institute and the biotechnology company PPL Therapeutics.

Dolly was created by inserting the nucleus of a somatic (non-sex) cell into an oocyte (developing ovum/egg) and then using an electric shock to cause this cell to divide. The resulting blastocyst is then implanted into a surrogate mother.