Over the past 15 years or so, tawny crazy ants from South America have been popping up across the southeastern U.S. like paratroopers dropping in from an invading army. Where they take hold, they’re like an ecological wrecking ball and they cause headaches for homeowners. Podcast host Marc Airhart joined biologist Edward LeBrun in the Texas Hill Country to test a new weapon in the battle against the destructive tawny crazy ant.