A first tiny cub - pink, hairless and only about the size of an adult mouse - was born at 5:35 pm (2135 GMT) Saturday and Mei Xiang reacted by tenderly picking up it up. Just when conservationists thought they had heard all the good news, the zoo tweeted: "We can confirm a second cub was born at 10:07. It appears healthy. #PandaStory."
Although panda numbers are on the rise, they are facing a new threat: economic development. Twenty-four of the 33 separate panda populations in China are so small they are deemed "high risk for survival."