Every time I ask this question, I feel like the answer sidesteps an actual explanation. Yes, I understand that the folded, wrinkled shape allows for more surface area. The heart of my question is WHY is that important? Like, if the outermost layer of the brain is important, why couldn’t it just be a thicker layer instead of just squishing more outermost layer into a wrinkled shape?
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Are you asking why evolution works the way that it does? Because your example might be plausible, it’s just that no creature has evolved that way (to my knowledge) and managed to develop the same degree of intellectual or processing capacity that humans have.
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