Cloning is back on the agenda, but the focus is now on spare parts.
It's like a Woody Allen script run backwards. In Allen's 1973 film Sleeper , attempts are made to clone Hitler from his preserved nose. In the two years since the world first learnt about the cloning of Dolly the sheep, this area of science has made huge progress. Not just sheep, but mice and cows have now been cloned from adult cells. But the real story is every bit as fascinating and far less alarming.