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From left: Dr. Ron James Managing Director of PPL Therapeutics, Dr. Keith Campbell Senior Scientist at PPL Therapeutics and Dr Ian Wilmut of the Roslin Institute stand with Dolly, the first cloned sheep and Polly, front, the worlds first transgenic lamb at the Roslin institute in Edinburgh in early December 1997. Polly, and another Lamb Molly, were produced using the same technique, called nuclear transfer, used to make Dolly, but the original cell came from a sheep fetus instead of from an adult animal. Scientists at the Roslin Institute produced Polly and Molly cloned with a human gene so that their milk will contain a blood clotting protein that can be extracted for use in treating human haemophilia. (KEYSTONE/AP/John Chadwick)