From "Eurasian Bookshelf" on Facebook -
https://www.facebook.com/photo/?fbid=1202752154987561&set=a.527495192513264: A Story Written in DNA
The Development of the East Eurasian Phenotype
The East Eurasian phenotype — the set of physical traits common among many East Asian, Siberian, and some Southeast Asian populations — didn’t appear overnight. It developed over tens of thousands of years as ancient human populations adapted to diverse climates, diets, and environments across the vast lands east of the Eurasian Steppe.
Modern genetic studies suggest that many distinctive traits — including epicanthic folds, shovel-shaped incisors, thicker hair shafts, and skin tone variations — evolved as adaptive responses to cold climates, UV radiation, and dietary factors during the Upper Paleolithic (roughly 40,000–10,000 years ago).
These traits are believed to have crystallized among ancient hunter-gatherer populations in northern and eastern Asia, particularly in regions like Siberia, the Yellow River basin, and the Amur River valley. Later migrations spread this phenotype widely — into China, Korea, Japan, and Southeast Asia — blending with local groups over millennia.
Genetics also shows fascinating connections between East Eurasians and Native Americans, who migrated across Beringia during the Ice Age, carrying parts of this shared ancestry into the New World.
This story is still unfolding, thanks to ancient DNA research — revealing how migration, climate, and time have shaped the diversity of human appearance across continents.
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