Nitpicking? You talk about how Inuits having Denisovan genes debunks the fact they need technology to survive in their cold climate, I tell you they actually do need their fur coat and igloos. Simple as that.
What I meant was that you had also implied that it was impossible for humans to ever adapt naturally to arctic climates. I stated, more or less, that it would have been possible over time, since other mammals had managed to do so, especially since some of the methods those mammals used involved no evolutionary adaptation. For example, there is the snow-cave which both humans and arctic animal use to seek shelter:-
https://en.wikipedia.org/wiki/Snow_caveThe point being that even arctic animals sometimes need natural extra , er, "technology" in the form of snow-caves.
My reason for being a nitpicker on this subject is due to my own past experiences. I once visited a centre for Palaeolithic research in Lower Austria. This was way back before the global warming scenario. The culture I was reading about existed c. 60,000 years ago. The temperature at the time I arrived(mid-October) was very cold(easily -10/ -20 plus extra for wind chill). All I could see were a few reasonably faithful, modern reconstructions. The original, palaeolithic tents were apparently made out of mammoth bones covered in furs. Now, men in those days had no access to matches, gas or electricity, so access to fires would have been sporadic due to high winds, storms, floods, the sheer difficulty of setting up a fire in a wet climate etc.etc. Wearing poorly-fitted furs would not have protected them much against the cold either(they did not have gore-tex or other modern materials after all). One would also expect the year-round average temperature to have been much colder than when I was there, given the Ice-Age at the time. Now, given the extra 1 degree Celsius body-temperature the Tierra del Fuegans had, one could reasonably assume that the average human/Cro-Magnon at the time could have maintained average body-temperatures as high as, say, 39.7 Celsius. Temperatures above 40 degrees Celsius would have been unlikely since enzymes in the body start deteriorating above that point. Mammals can attain up to 39.7 Celsius, well, goats do, so humans could feasibly adapt to that, being themselves mammals:-
https://www.goldennumber.net/body-temperatures/Then, when we take into account other factors such as the fact that years on a raw diet lead to better blood-circulation and better toleration of the cold as a result, according to testimonials, and that those raised on a mostly raw diet from birth would have benefitted even more, along with improvements created by natural selection, one can see that full adaptation to the arctic climate could have come within reach. And then there is Wim Hof.... I am hoping to emulate him somewhat in the next few months, though I doubt I will be brave enough to run around in the snow for hours in just shorts and trainers and socks like he supposedly does, if only out of embarassment.
