A mountain lion miraculously surviving in the urban mountains here is believed to have breached a 9-foot fence at the Los Angeles Zoo and mauled an 18-pound koala at night, officials said Thursday.The Australia-born koala, named Killarney, was the only one of the zoo’s 11 koalas who often dared to leave her tree at night and roam the pen’s ground, which apparently made her easy prey for the young male ...