Back in 1997, the most famous Dolly in the world crooned country tunes and gamely fielded jokes about her ample bosom. But working in a small rural town in Scotland, British scientist Ian Wilmut decided to steal some Dolly Parton's limelight, making history by cloning the first mammal, a sheep, from a mammary cell and naming the pioneering animal — you guessed it — Dolly (at far right). This week marks the 10th anniversary of Wilmut's description in a scientific journal of Dolly's unique development and birth — and a good time to take stock of the cloning stockyard.