Ten Years of Cloning

DOLLY THE SHEEP
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.

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