19-year-old giant panda gives birth to twins, becoming the oldest known first-time panda mom CBS NewsHong Kong’s giant panda Ying Ying gives birth to twins CNNHong Kong’s ‘miraculous’ newborn twin pandas will remain in city, officials say South China Morning PostPanda twins are born in Hong Kong to Ying Ying, the world’s oldest first-time mom The Associated PressAt 19, a Hong Kong Panda Is Finally a Mother The New York Times