panda cub

Atlanta's zoo announced the names of two 100-day-old panda babies born there this fall. Their names Ya Lun and Xi Lun mean "elegant" and "happy," and honor their mother, Lun Lun.

A team of veterinarians performed emergency surgery to remove a dense, lemon-sized mass of bamboo. His prognosis is "very good."

Genetic testing also showed that he was sired by Tian Tian, the zoo announced.