Twin pandas at Zoo Atlanta
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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.