I’ve read that East Asians developed slanted eyes or Epicanthic Folds as a way to adapt to snow blindness in the more snowy and colder regions of Asia, and I was wondering why Northern Europeans, specifically Germanic and Nordic people that lived in the colder regions of Northern Europe, didn’t develop the same genetic trait or at least something similar to it.
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Even if epicanthic folds developed to help with snow blindness, just because an adaptation might be beneficial, doesn’t mean it will develop. An example someone else told me is, “if we put thousands of mice in a snowy environment, we might expect to be able to time travel to the future and find a bunch of cute mice with extra furry coats, but it’s equally as likely that we’ll just find a bunch of dead mice”. Evolution isn’t so much a process of improvement as it is a process of change.
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