The feature of the epicanthic fold, particularly prevalent among East Asian populations descended from Haplogroup A, is an adaptation to cold, windy, and bright environments encountered as humans migrated northward from Africa. This phenotype likely developed to protect the eyes from frostbite and snow blindness, showcasing how genetic diversity within human lineages adapted to specific environmental challenges.
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Phenotype Variation: Eye Shape and the Epicanthic Fold
By Michael Alan Prestwood
Sun 14 Apr 2024
Published 2 years ago.
Updated 2 years ago.
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Phenotype Variation: Eye Shape and the Epicanthic Fold
circa 40,000 BCE
— map / TST —
Michael Alan Prestwood
Author & Natural Philosopher
Author & Natural Philosopher
Prestwood writes on science-first philosophy, with particular attention to the convergence of disciplines. Drawing on his TST Framework, his work emphasizes rational inquiry grounded in empirical observation while engaging questions at the edges of established knowledge. With TouchstoneTruth positioned as a living touchstone, this work aims to contribute reliable, evolving analysis in an emerging AI era where the credibility of information is increasingly contested.
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