Hong Kong celebrated the birth of its first two locally-born giant pandas on Thursday. Their mother, Ying Ying, set a record as the world’s oldest first-time panda mother. She gave birth to the twins at Ocean Park just a day before her 19th birthday, equivalent to 57 in human years. Ying Ying and her partner, Le Le, successfully mated naturally in March. So, here’s all you need to know about panda’s birth facts: A newborn panda cub weighs only 90-130 grams. At birth, a cub is about 1/900th the s

PANDA PLAY: Panda twins Leni and Lotti were seen exploring their new playroom at the Berlin Zoo in Germany recently. The zoo said that the nearly five-month-old sisters are big enough to leave their "crib" for a more stimulating environment. The zoo added that the cubs spend most of their days with their mom Meng Meng in the playroom before returning to their crawling box at night. | CBS Newspath