This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (CNN) — On February 22, 1997, the world ...

It’s been 20 years since the world was first introduced to Dolly, the Finn Dorset sheep who was the first mammal to be successfully cloned using adult animal cells. Researchers at the Roslin Institute ...

May 26 -- Dolly the cloned sheep may be susceptible to premature aging and disease because her genes were copied from a 6-year old sheep, Scottish scientists say. There is no direct evidence that ...

Dolly the cloned sheep was put to death Friday, after premature aging and disease marred her short existence and raised questions about the practicality of copying life. The decision to end Dolly's ...

There may be hope in saving animals in danger of going extinct: cloning. Sir Ian Wilmut, whose team gave life to Dolly the Sheep, suggests a biological bank that contains egg and sperm cells and also ...

All the Latest Game Footage and Images from Finn Dorset's Institute For Livestock Replication An animated incremental game about cloning livestock. Make as many moon sheep as you can. Research ...

Purebred puppies from the same litter tend to look pretty much the same. But a trio of littermates born recently in Korea don't just closely resemble each other — they're clones that share nuclear DNA ...

(CNN) — On February 22, 1997, the world learned about a secret project that scientists at the Roslin Institute in Scotland had been working on. More than seven months earlier, on July 5, 1996, they ...