Eris - initially given the codename "Xena" after a TV character - was discovered on 8 January, 2005, at the Palomar Observatory in California.

BBC: NEWS | Science/Nature | Astronomers name 'world of chaos'

Researchers implanted 72 embryos to get the five piglets born in March, and Xena was the only pig born out of more than 100 cloning attempts.

CNN: Researchers clone pigs

At a full council meeting on Tuesday, Councillor Xena Dion said if she had bought the lifting bridge she would have "taken it back by now".

BBC: Twin Sails Bridge 'has 100 defects'

Researchers working together in Japan and New York reported in Wednesday's issue of the journal Science that they had cloned a pig named Xena.

CNN: Researchers clone pigs

It was a chance visit (prompted by her errant dog, Xena) to an illegal dumping ground by the Bronx River that proved to be Carter's environmental tipping point.

CNN: Blazing a green trail through the Bronx

Xena was cloned with a method called "microinjecting, " the scientists in Japan and New York reported.

CNN: Researchers clone pigs