HomeScienceAncient Americans Crossed Back into Siberia in a Two-Way Migration,

Ancient Americans Crossed Back into Siberia in a Two-Way Migration,


master mentalism tricks

Science has long known that people living in what is now Siberia once walked (and later paddled boats) across the Bering Strait into North America. But new evidence now shows that these early migrations weren’t one-way trips: in a study published on Thursday in Current Biology, researchers say they have uncovered traces of Native American ancestry in the DNA of Siberians who lived centuries ago.

This American heritage—still present in the genomes of some Siberians today—adds to a scattering of archeological evidence suggesting that North Americans were in contact with their northern Asian neighbors for thousands of years before Europeans arrived.

The discovery is not wholly unexpected. “Human movement is rarely unidirectional,” says the new study’s co-author Cosimo Posth, an archaeogeneticist at the University of Tübingen in Germany. “There is usually some back and forth.”

Exactly when and how people first arrived in the Americas is one of the longstanding debates in archaeology. Hypothesized dates vary widely, but many researchers agree that the earliest migrants likely traveled across the Bering Land Bridge, a strip of land that periodically connected northern Asia to modern-day Alaska in prehistory. This transcontinental highway succumbed to rising sea levels sometime between 11,000 and 10,000 years ago, but that didn’t stop migrations between the landmasses. Genetic studies and archaeological digs indicate that people from Siberia made the move into North America several more times, including as recently as 1,000 years ago.

But even though a lot of research has focused on reconstructing the arrival of people into what is now Alaska, “very little is known about migration in the other direction,” Posth says.

That is slowly starting to change. A 2019 study found genetic evidence that ancient people living on opposite sides of the Bering Strait were in contact with each other. And a small number of archeological finds in Alaska—including the discovery of 15th-century glass beads that may be of Venetian origin—have pointed toward ongoing trade between North America and the rest of the world.

But how far from the strait these ties extended is unclear. Little is even known about how people moved around within Siberia in the past few thousand years. Hoping to reconstruct this part of the region’s history, Posth and his colleague’s sequenced DNA from 10 ancient people whose remains were unearthed at various sites around Siberia.

The oldest of these samples dates back 7,500 years. The study also included genomes from three people who lived on the Kamchatka Peninsula—which dangles down from the Russian Far East well to the southwest of the Bering strait—just 500 years ago. These sequences were the first ancient DNA samples to come out of the remote peninsula, Posth says.

Siberia was once a hotbed of migration that put ancient Siberians in contact with populations as distant as Japan and Greenland, the researchers found. Their analysis also revealed a previously unknown connection between Native Americans and people who were living in Kamchatka a few centuries ago. The team found that the ancestors of these Kamchatkans had met with North Americans at least twice before: once between 5,500 and 4,400 years ago and again around 1,500 years ago. These connections show the influence of Native Americans farther inland than previous studies.

Posth says he expected to find some evidence of Native American contact in Siberia, but he was surprised by how long ago these run-ins had occurred. Those ancient encounters weren’t the last time Kamchatkans interacted with North Americans either. The team found an even higher percentage of Native American DNA in the genomes of modern Kamchatkans, suggesting that the people of the peninsula were also in contact with North Americans during the past few centuries.

It remains unclear how DNA from North America made its way into Kamchatkans, Posth says. The Kamchatkans’ ancestors could have inherited the DNA from other Siberians carrying this heritage, or they may have come into contact with Native Americans themselves. Still, Posth and his colleagues’ study builds on previous genetic research by showing that DNA was moving from North America into Siberia, says Dennis O’Rourke, an anthropological geneticist at the University of Kansas, who was not involved with the new paper.

The fact that people from northern Asia and North Americans did come into contact isn’t that surprising if one considers how close the two landmasses are to each other, says Anne Stone, an anthropological geneticist at Arizona State University, who also was not involved with the new research. For one thing, the Aleutian Islands (where the Aleut people historically hunted and traded) form a chain that starts just off southwestern Alaska and runs westward to point directly at Kamchatka.

As for the Bering Strait, Stone says that although the region’s early inhabitants may have become isolated from one another after the disappearance of the Bering Land Bridge, later generations wouldn’t have been so limited. “They’ve got boats,” Stone says. “So they could visit and trade with each other.”

Read The Full Article Here


trick photography
Advertisingfutmillion

Popular posts

Rami Malek to Lead Buster Keaton Miniseries From Matt Reeves
Despite Cobra Kai Ending, EPs Tease ‘More Karate Kid Stories’
Captain America: New World Order Adds Xosha Roquemore
Michael Jackson’s Nephew Will Play Him in Upcoming Biopic
The Ark’s Cast and Crew Gave Us the Exclusive Scoop
10 Best Episodes of ‘Dawsons Creek,’ Now 25 Years Old
Fantasy Island Exclusive Sneak Peek: Roarke Welcomes Her Very First
9-1-1 Sets Season 6 Return Date
Frank Ocean Restocks Blonde Vinyl for the First Time in
Cordae & Anderson .Paak Hit the Club, Ponder Relationships in
Watch Lizzo Perform “Break Up Twice” and “Someday at Christmas”
The 1975 Fan Accidentally Buys Matt Heafy (Trivium) Cameo Video
6 Best Freckle Pens for a Natural, Sun-Kissed Look
30 ASOS Dresses That You’ll Love and Wear Year-Round
Mikayla Nogueira Mascara Scandal: Should We Ever Trust Influencers?
The Best Holiday Gift Sets for the Beauty Lovers on
CATHERINE, CALLED BIRDY, Sexism, Ableism, and Me: What I Learned
Your Guide to This Year’s ALA Youth Media Awards
Interview with John Etterlee, Author of Blood Red
Reading Resolution: Shopping My Shelves in 2023
Joint effort discloses deep divergence of a mysterious porpoise
How to watch the rare green comet whiz past Earth
Double Disaster: Wildfires Followed by Extreme Rainfall Are More Likely
Fossil site reveals giant arthropods dominated the seas 470 million
Snap Founder Slams the Metaverse, Says People Prefer Augmented Reality
Lina Khan’s Plan to Liberate US Workers
Crypto a Viable Retirement Plan for Most Millennials, Gen Zs
Motorola Working on Edge-Series Phone With Stylus Support for 2023: