The staff at Zoo Atlanta in Georgia can bear-ly contain their delight. On September 6, giant panda Lun Lun gave birth to the first cub born at the zoo. This birth is good news for pandas, which are endangered. The almost hairless cub is about the size of a stick of butter. "These are small offspring and quite fragile," says Dwight Larson, a zoo official. No big bear hugs just yet.