Invasive 'crazy ants' are nastier and far tougher than we imagined

Invasive 'crazy ants' are nastier and far tougher than we imagined: Tawny crazy ants, as we're learning, are a total headache. As they make their way north at a rate of 600 feet a year, they're wreaking havoc on populations of insects, spiders, centipedes and crustaceans. This is likely to cause deleterious effects on various ecosystems. They can't be stopped with conventional pesticide, they've been known to disable a huge industrial plant, and they frequently short out electrical equipment.