In this photo provided by the San Diego Zoo, giant panda cub Xiao Liwu stretches out and shows his belly while animal care staff check him over during his weekly exam at the San Diego Zoo, Thursday, Nov. 29, 2012. Nutritionist Jennifer Parsons took his measurements and noted that this panda cub is growing as expected, his measurements are on track with other giant pandas born at the Zoo. <AP Photo/San Diego Zoo, Ken Bohn>
