SYDNEY (BLOOMBERG) Does the idea to use artificial intelligence (AI), drones and electric force fields to prevent sharks from eating human bathers have teeth? Several tech start-ups in Australia say yes. Officials in the United States are watching the advancements keenly, aware that climate change is altering migration patterns and threatening to push great whites ever closer to American shores. This summer, sharks have attacked teenagers on beaches from California to New York. Sharks typically frequent lower latitudes, but warming oceans are pushing their prey north, said Florida Atlantic University Professor Stephen Kajiura.