Giant panda cub Xiang Xiang celebrated her first birthday Tuesday at a Tokyo zoo, remaining in good health.Born on June 12 last year to mother Shin Shin and father Ri Ri through natural mating, Xiang Xiang enjoys climbing trees every day and eating apples, according to the Ueno Zoological Gardens, where the panda cub is the star attraction.A zoo official said, "She has been growing very smoothly. We want visitors to continue to warmly watch over her development."Ahead of her birthday, the zoo boosted the maximum number of viewers allowed per day at the panda enclosure to 15,000 from 9,500. …READ FULL ARTICLE