In relation to the Copycat story, www.scotsman.com brings a brief sumary of cloning to this date.
1952: Robert Briggs and Thomas J King clone northern leopard frogs using a method of nuclear transfer and kick off nearly two decades of heavy scientific interest in cloning research.
1963: Embryologist Tong Dizhou clones a fish. He publishes the findings of his clone of the harp in an obscure Chinese science journal.
1978: The birth of Louise Brown, the first child conceived through the use of in vitro fertilisation.
1983: First human mother-to-mother embryo transfer.
1993: Human embryos cloned.
1995: Ian Wilmut and Keith Campbell, of the Roslin Institute near Edinburgh, successfully clone two sheep, Megan and Morag, from differentiated embryo cells.
1996: 5 July - Dolly the sheep is the first mammal to have been successfully cloned from an adult cell. Scientists at the Roslin Institute initially keep her birth a secret.
February 1997: Scientists confirm the birth of Dolly.
July 1997: Wilmut and Campbell create Polly, a lamb cloned from skin cells grown in a lab and genetically altered to contain a human gene.
December 1997: Harvard graduate Richard Seed announces that he plans to clone a human being before any federal laws can be enacted to ban the process.
1999: The journal Nature suggests Dolly may be susceptible to premature ageing. It is also suggests that she may have been genetically six-years-old at birth, the age of her parent.
2003: Dolly dies on 14 February, at the age of six.
2004: Wilmut applies for a licence to clone human embryos, after scientists at Newcastle University are granted a similar licence
Illustration: Klone #92 by Dieter Huber.