People have always wondered where our ancestors came from and how they managed to migrate across continents long before planes, trains, or roads ever existed. For centuries, archaeologists have studied the fragmented remains of ancient cities and artifacts left behind. In the last few decades, though, genetics has started filling in some of the gaps.

Earlier this month, archaeologists studied an ancient tooth that revealed new details about Stonehenge's construction . Across the Atlantic in Colombia, researchers have reexamined the remains of ancient Indigenous groups that lived 6,000 years ago. What they found was unprecedented. According to a new scientific study, one of these groups turned out to be from an entirely new lineage that had gone unnoticed until now.

Here's what scientis

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