She's only three months old, but this little white wonder already has adoring fans. The polar bear cub is the latest addition to the Buffalo Zoo in upstate New York. Zookepers have named her Luna because she was born on a full moon. But that could soon change - a naming contest is being held on Facebook where the public can make suggestions for her formal zoo name. The Buffalo Zoo is just one of two zoos in North America to have a polar bear birth last year.