Scientists just uncovered a totally unexpected group of ancient hunter-gatherers who lived near the land bridge between North and South America 6,000 years ago. Their DNA doesn’t match any known ancient North or South Americans—like, who were these people?! They vanished 4,000 years later, and no one knows if they mixed in or disappeared. This could totally change what we know about how humans spread across the Americas! #AncientDNA #HistoryMystery #ScienceNews #Science