ALBANY, Ga. (AP) _ For years, experts predicted fire ants couldn't tolerate frosty winters in the north Georgia mountains. But the aggressive, fast-breeding South American pests have defied predictions, spelling trouble for crops, wildlife and people. Fire ants have spread to all of Georgia's 159 counties and a new type discovered in the Rome area seems especially adept at hunkering deep in the ground to escape the cold, said Wayne Gardner, a University of Georgia entomologist. With no natural enemies outside South America, fire ants have spread across about 275 million acres in the past 80 years, mostly in southeastern...