Dolly, the sheep, became a scientific sensation when her birth was announced in 1996. Now, 14 years on, the scientist, who cloned Dolly, has claimed to have created four more sheep who are the exact genetic duplicates of Dolly, the world's first mammal to be cloned from an adult somatic cell.

The quads, which have been nicknamed 'the Dollies', are exact genetic copies of their predecessor who was put down seven years back only to end her suffering from advanced lung disease and arthritis, the Daily Mail reported.