Dr. Alan Colman, a member of the team that cloned Dolly the sheep -- the first cloned mammal -- in 1997, told CNN that within 20 years stem cell therapies could be used to treat degenerative diseases such as diabetes, congestive heart failure and Parkinson's disease.

CNN: Cloning success hailed, feared

In 1997, when Dolly the sheep became the first mammal to be cloned from an adult sheep, cloning a human entered the realm of possibility.

CNN: 'Raelian' biochemist insists she will clone human

Dr Ian Wilmut, who created Dolly, the world's first cloned sheep, said it took 277 tries to get it right.

CNN: Team to attempt human cloning

The centre became famous in 1996 for creating Dolly the sheep - the first mammal to be cloned from an adult cell.

BBC: cows

The prospect of cloning a human moved from science fiction into the realm of possibility in 1997, when Dolly the sheep became the first mammal to be cloned from an adult.

CNN: Group says it will move human cloning work offshore

Dolly the sheep -- the first cloned animal -- was created over 10 years ago, and the only previous claim of human embryo cloning by South Korean scientist Woo Suk Hwang in 2004, was discredited.

CNN: You, again: Are we getting closer to cloning humans?

Thirteen years ago, the world's first mammal to be cloned using DNA from an adult cell, Dolly the Sheep, was born in Edinburgh.

BBC: 'First camel clone' born in Dubai

Such nuclear transfer produced Dolly the sheep, the world's first cloned mammal, four years ago.

ECONOMIST: Cloning still looks far too dangerous to attempt

Dolly the sheep was the world's first mammal cloned from the DNA of an adult cell and was unveiled to the public in 1997.

BBC: Dolly the sheep pioneer knighted