Goodness Gracious, What Is In The Water At The Zoo?

As if an anteater pup, a baby gorilla, and fluffy leopard cubs weren't enough: the AP is reporting that the National Zoo is temporarily closing the panda house to determine whether or not Mei Xiang is having a cub. The most recent round of insemination from Tian Tian was in January -- Mei Xiang has been sprucing up the den and doing some cuddling recently, so who knows? Drink from the water fountains at the Zoo at your own risk, people.