- Archaeological News
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Image Credit: AlaskaNPS,, via Wikimedia Commons
Genomic Study Reveals Complex Origins and Diversity of Indigenous Americans
A major genomic study has revealed a far more complex evolutionary history for Indigenous peoples of the Americas than previously understood, highlighting multiple migration waves, deep genetic diversity, and long-term adaptation to diverse environments.
The research analyzed 128 high-quality genomes from Indigenous populations across Latin America, representing dozens of communities and language groups. The results show that Indigenous Americans carry significant previously undocumented genetic variation, reflecting both long-term isolation and underrepresentation in global genomic research.
The findings indicate that human populations entered the Americas more than 15,000 years ago, with their ancestral origins tracing back to around 25,000 years ago in the Beringian region. After a period of relative isolation, groups rapidly dispersed across the continent, forming distinct populations shaped by geography and environment.
Importantly, the study identifies evidence for at least three major population dispersals into South America. These movements, followed by regional differentiation and long-term continuity, challenge earlier simplified models that assumed a single migration wave.
Genetic patterns closely reflect geography, with clear distinctions between North and South American populations and further substructure within regions. The research also shows that historical events—especially European colonization—had a profound impact, leading to population decline, fragmentation, and reduced genetic diversity in many Indigenous groups.
The study further identified genetic adaptations linked to immunity, metabolism, reproduction, and development, shaped by the wide range of climates and environments across the Americas. Some genetic signals appear to have been maintained for more than 10,000 years, suggesting long-term evolutionary advantages.
In addition, researchers detected limited contributions from archaic human populations such as Neanderthals and Denisovans, as well as traces of an ancient ancestry component shared with Australasian populations. These elements reflect complex interactions during early human migrations and subsequent adaptation processes.
Overall, the study underscores the importance of expanding genomic research to better represent Indigenous populations, whose genetic history holds key insights into human evolution, migration, and adaptation.
Published on: 24-04-2026
Edited by: Abdulmnam Samakie
Source: Nature
