A little more than two months after two giant pandas — the first sent to the U.S. in 21 years — debuted at the San Diego Zoo, fans can now do a virtual pop-in. "Xin Bao and Yun Chuan have acclimated beautifully to their expansive, bamboo-filled homes and now their playful antics and natural behaviors can be observed from anywhere," the zoo said in a news release.