Tian Tian, the 275-pound male giant panda at the Washington, DC's National Zoo.
- [Chip Somodevilla/Getty Images]

Tian Tian climbs a tree in his outdoor enclosure the day after the death of a 6-day-old panda cub at the National Zoo.
- [Chip Somodevilla/Getty Images]

Yuan Zi, one of two giant pandas that arrived last winter in France from China, eats an ice, in August at Beauval zoo in Saint-Aignan, central France.
- [Alain Jocard/AFP/Getty Images]

A worker shows off one of the baby pandas at the Giant Panda Research Base in Chengdu, southwest China's Sichuan province. China engages in what's been called "panda diplomacy," using the endangered but iconic bears as diplomatic gifts to other countries. China also runs a lucrative trade hiring the animals out to foreign zoos.
- [STR/AFP/Getty Images]

A panda in the Olympic Games Panda Bear enclosure at the Beijing Zoo. During the World War II, most of the zoo's animals died of starvation with only 13 monkeys and one old emu surviving the war.
- [Mark Ralston/AFP/Getty Images]

A panda bear sleeping in the Olympic Games Panda Bear enclosure at the Beijing Zoo.
- [Mark Ralston/AFP/Getty Images]

Hard to breed: A pair of giant pandas play in their enclosure at China's Beijing Zoo.
- [Lintao Zhang/Getty Images]