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>This really only applies to northern Europeans. We are the only cold adapted peoples because of the ice age. Incorrect. Northeast Asians had to deal with argu
by jyscao 3y ago
>This really only applies to northern Europeans. We are the only cold adapted peoples because of the ice age.
Incorrect. Northeast Asians had to deal with arguably harsher cold climates than northern Europeans. Some examples of research on this subject (just the first couple I found through search):
* Extreme climate, rather than population history, explains mid-facial morphology of Northern Asians (https://pubmed.ncbi.nlm.nih.gov/24374801/ https://pubmed.ncbi.nlm.nih.gov/24374801/)
* Searching for Signatures of Cold Climate Adaptation in TRPM8 Gene in Populations of East Asian Ancestry (https://www.frontiersin.org/articles/10.3389/fgene.2019.00759/full https://www.frontiersin.org/articles/10.3389/fgene.2019.0075...)
Not to mention, this article on the zinc metabolism gene variant explicitly states:
>Although the variant was established in Asia as a result of interbreeding between Denisovans and sapiens, it also spread to European and native American populations.
- Podgajski 3y agoThose east Asians are carrying the same cold adapted genes from the same people the Northern Europeans got them from. The Denisovans and Neanderthal have a common ancestor. https://evolution.berkeley.edu/wp-content/uploads/2020/08/evo-news-denisovans.jpg https://evolution.berkeley.edu/wp-content/uploads/2020/08/ev... The ice age you’re talking about and what I’m talking about are different. The age I’m talking about is the one that caused that split. And it happened 400,000 years ago. https://cdn.serc.carleton.edu/images/eslabs/cryosphere/timeline_ice_ages_456.webp https://cdn.serc.carleton.edu/images/eslabs/cryosphere/timel... These are extremely ancient cold adaptive genes. From the study: “ Given the essential role of the mitochondria in skeletal muscle thermogenesis, we propose that the derived G allele, which we have shown provides better protection to the mitochondria, may have been positively selected to facilitate adaptation to cold while providing higher susceptibility to neuropsychiatric traits. This is a plausible scenario for a case of archaic adaptive introgression, as Denisovans and Neanderthals were probably already well adapted to the local environmental conditions modern humans encountered when expanding across Eurasia.” I admit to my over generalization Only because it can get too complicated explaining it all on HN.