The center carries out its work at the National Zoo in Washington,D.C.

VOA: special.2010.06.22

And scientists have artificially inseminated Tai's mother, Mei Xiang,in the hopes that she'll soon produce another panda cub for the National Zoo.

VOA: standard.2010.02.02

"It feel like I'm in a zoo. It's sad because I think it's a beautiful sculpture, and it would be a lot better to see it without the fence in front,"

VOA: standard.2010.02.17

Tai Shan achieved a certain celebrity status here in the U.S.capital as visitors flocked to the zoo to see him and his parents, and 11-year-old father Tian Tian, who were born in China.

VOA: standard.2010.02.02