Twin panda birth surprises Atlanta zoo staff
16 July 2013 Last updated at 10:32 BST
Staff at an Atlanta zoo got more than they expected when a Giant Panda gave birth to twins on Monday.
They had been expecting Lun Lun to give birth to a single cub.
"We had no reason to expect twins, although we had not ruled them out," said Dwight Lawson, deputy director of Zoo Atlanta.