Longest-living cloned sheep reaches 14th birthday

China's first successfully cloned sheep, Yang Yang, has just had its 14th birthday.

China's first successfully cloned sheep, Yang Yang, has just had its 14th birthday. And it's got something else to celebrate too, as it's the world's longest-living cloned sheep.

Yang Yang was born in 2000. One year later, it cross-bred with an Angora, and now has four generations of offspring.

Scientists say Yang Yang is fed, and can reproduce in the same way as any ordinary sheep. As its expected life span is 16 to 18 years, Yang Yang is now in its old age.