including samples from Tian Tian, Bao Bao’s father. In another of the panda’s many oddities, it has very hardy sperm. Unlike, say, bull semen, panda semen does well when it’s cryopreserved ...

Although born in China, the male, Bao ... Tian Tian, arrived in D.C. in 2000 and lived at the National Zoo for nearly a quarter-century. Over the years, they welcomed the zoo's first-ever ...