SYDNEY (Reuters) - No one really knows if the millions of giant moths that swoop down on Australian cities each spring are suicidal or just sloppy aviators. Either way it's swatting season again Down Under. Reuters Photo Unlike the kangaroos and crocodiles that inhabit Australia's vast outback and swamps, the moths, called bogongs, prefer the big city lights of Sydney and Melbourne, where they flutter into high-rise offices, drown in bowls of soup, pester bus drivers, even freeze to death in refrigerators, come late October. "They travel at night and are attracted to urban lights and the type used for...