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...

Was humankind's first exit from Africa a failed activity?

Prior posts have noted that the accepted wisdom is that some humans left Africa about 60 thousand years ago, and thereafter migrated all over the world. Now, researchers have found stone tools at a site in the Arabian Peninsula that suggests movement some 125 thousand years ago. Many advocates for...