Mei Xiang, 22, is oldest giant panda in US to give birth, also first to do so in US using frozen semen
"A precious giant panda cub has arrived!" That was the excited tweet Friday evening from the National Zoo in Washington, DC, announcing the birth of what the Washington Post
calls a "miracle cub." Giant panda Mei Xiang, 22, delivered a "wonderful, wiggly cub" at 6:...