Although fire ants originated in the U.S. as the result of "imports" from South America, their spread to many other countries is from the U.S., new genetic assessment shows

Fire ants are a royal pain (literally and figuratively). Chemical pesticides and many other brews have tried to wipe them out, unfortunately without success. They are now colonizing many other countries. But, what is the origin of these new invasions? The aggressive, stinging fire ants ( Solenopsis...