Animal babies
This Friday, Nov. 19, 2010 photo provided by the San Diego Zoo shows Giant panda cub Yun Zi as he tugs at his 19-year-old mother, Bai Yun, during a tremendous play bout at the San Diego Zoo. The pair spent 20 minutes wrestling in dirt, climbing logs and exploring the exhibit before taking a nap and starting over. Ken Bohn / San Diego Zoo
