CharonY Posted December 19, 2022 Share Posted December 19, 2022 3 hours ago, Lorentz Jr said: Clothing over smooth skin (A) is better than clothing over hairy skin (B). Clothing over hairy skin is better than no clothing at all (C). Not saying that's true, but A>B doesn't disprove B>C. I think the issue is that it is very easy to make some sort of grand hypothesis in terms of evolution just by conjuring a scenario that somehow provides some kind of selective pressures that seemingly make sense. Things like the aquatic ape hypothesis are rightly criticized because of those. So if we think that we can come up with something better, at lease some level of evidence should be provided that whatever we come up with is in line with what we know (or at least have some sort of evidence). Fundamentally I find narratives that some species did this and this is why the lost a particular genetic trait problematic, as it conjures the idea that once a species did a thing, it resulted in genetic changes. The reality is the opposite of course. Mutations for hair loss occurred, likely somewhat frequently, but their frequency only increased when they either were not detrimental or became under positive selection. I was typing the comments below, when I noticed that joigus provided a similar reference so I am just keeping it brief and just state that the timeline when changes in hair patterns happened predated any evidence of potential tools that could be used for making some sort of warming clothes. So things like simple shelters or rain protection obviously had low impact on those mutations as all our relatives are still fairly hairy. But what the drivers are to keep hair loss around is still up to debate and as joigus pointed out, far from resolved. Link to comment Share on other sites More sharing options...
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