Argentines are the only animal species other than humans that have learned to manage societies with billions of members. They have turned their superorganisms into what some scientists, including Moffett, call supercolonies: Argentine nests have expanded by territorial conquest across four continents, devastating other ant species along the way.
The smell is strong: One milligram of pheromone would be enough to lure a column of workers around the world multiple times.
They snap shut at 145 miles an hour, the fastest muscle action of any animal on the planet.