Arctic Expansion

Genetic analysis reveals the history of the earliest human migrations in the region.

By | September 2, 2014

FLICKR, NASA GODDARDThe Arctic’s earliest human inhabitants migrated into the region from Siberia approximately 6,000 years ago. These so called Paleo-Eskimo peoples lived in isolation—despite periodic migrations of other populations—before suddenly vanishing 700 years ago, according to a study published last week (August 29) in Science.

This genetic analysis of 169 ancient and present-day humans used museum specimens of bones, teeth, and hair from Alaska, Canada, and Greenland; the researchers, led by Maanasa Raghavan and Eske Willerslev of the University of Copenhagen in Denmark, also sequenced the genomes of modern-day Native American, Inuit, and Aleutian Islander families to enable comparative analyses.

Their results showed that Paleo-Eskimos spread into the Arctic independent of Native American and Inuit migrations. Although it periodically abandoned the area, this Paleo-Eskimo population lived there in near-isolation for almost 4,000 years before disappearing. The team’s analyses also showed that modern-day Inuits are not directly related to these earliest settlers, suggesting that the ancient Paleo-Eskimo lineage did not vanish simply due to interbreeding.

“Elsewhere, as soon as people meet each other, they have sex,” Willerslev told National Geographic. “Even potentially different species like Neanderthals [and modern humans] had sex, so this finding is extremely surprising.”

Instead, this population may have developed medical problems as a result of continuous inbreeding, which may have contributed to their eventual extinction, Willerslev told The New York Times. Another potential factor may have been climate change, as periodic fluctuations of even a few degrees could cause a loss of marine food resources.

“By using genetics and genomics, they were able to answer questions that archaeologists have been trying to solve for decades,” anthropologist Todd Disotell of New York University who was not involved in the research told the New York Times. “With genetics, you’re looking at the ancient people themselves, not their refuse, so to speak.”

Advertisement

Add a Comment

Avatar of: You

You

Processing...
Processing...

Sign In with your LabX Media Group Passport to leave a comment

Not a member? Register Now!

LabX Media Group Passport Logo
Advertisement

Popular Now

  1. Antibody Maker Loses License Over Animal Welfare Violations
  2. ORI: Researcher Faked Dozens of Experiments
    The Nutshell ORI: Researcher Faked Dozens of Experiments

    A former scientist at the University of Michigan and the University of Chicago made up more than 70 experiments on heart cells, according to the Office of Research Integrity.

  3. Exploring Emotional Contagion
  4. Amyloid Thwarts Microbial Invaders
    Daily News Amyloid Thwarts Microbial Invaders

    Alzheimer’s disease–associated amyloid-β peptides trap microbes in the brains of mice and in the guts of nematodes, a study shows. 

Advertisement
Diagenode
Diagenode
Advertisement
Biosearch Technologies
illumina Corporate
illumina Corporate