Local authorities on Thursday announced the birth of two giant panda cubs at Ocean Park Hong Kong to the world’s oldest first-time panda mother. The female and male cubs were born after being conceived naturally by mother Ying Ying and father Le Le in March, the government in Hong Kong said in a statement. They were the first panda twins to be born in Hong Kong. “This is a very critical period for the health of the newborn giant panda cubs,” the statement said. Experts from the zoo and the China Conservation and Research Centre for the Giant Panda (CCRCGP) have been monitoring the condition of…