00:00Ancient DNA from Colombia reveals a missing branch in human migration.
00:06Scientists expected ancient DNA from Colombia to help fill in the story of how people moved into South America.
00:13Instead, it opened a new mystery.
00:16Researchers studied ancient remains from the high plateaus near present-day Bogota,
00:20a region sometimes described as a gateway between Central and South America.
00:25That location is crucial.
00:27For early humans spreading south, Colombia was not just another stop.
00:32It was a crossroads.
00:34A doorway into an entire continent.
00:37The surprise came from the DNA.
00:41The people who lived there about 6,000 years ago did not fit neatly into the known genetic picture.
00:48They were not closely linked to ancient North American Native American groups in the expected way,
00:53and they did not clearly match ancient or present-day South American groups either.
00:58It was as if scientists had found a missing branch in the human family tree.
01:03Then, the mystery got stranger.
01:06About 4,000 years later, that ancient group seemed to disappear from the genetic record in the area.
01:13A different population lived there instead.
01:16What happened?
01:17Scientists do not know.
01:19They may have mixed into other groups.
01:22They may have moved.
01:24They may have been replaced.
01:26Or their descendants may still exist somewhere scientists have not sampled yet.
01:31That is why ancient DNA is so powerful and so limited at the same time.
01:36It can reveal lost connections.
01:39But it cannot tell the whole human story by itself.
01:43Culture, language, oral history, migration, survival, and identity are bigger than a DNA chart.
01:49Still, this discovery matters.
01:52It shows that the peopling of the Americas was not a simple straight line on a map.
01:57It was layered.
01:59Regional.
02:01Complicated.
02:02And still full of people whose stories are only beginning to return.
02:05Learn.
02:05Learn.
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