Fido Times Two

Fido Times Two

Updated: July 27, 2010

Since the first groundbreaking animal -- Dolly the sheep -- was cloned from an adult cell back in 1997, scientists have extended the family of clones to include pigs, monkeys, cows and even household pets like cats and dogs.

Image: Gallery: Fido Times Two
Gallery: Fido Times Two

Learn more about how cloning works.

 
 

 

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