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jimrandomh comments on Metaphilosophical Mysteries - Less Wrong
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Ancient humans used the stars in the night sky as a compass to navigate by, so it would have been selected for. That said, I think (1), that astronomic ability is almost universal in eye space, is true. (At least for eyes that can see predators and obstacles in the dark, which much more strongly selected for than being able to navigate by starlight is.)
I was going to suggest that, but didn't want to stretch the layout too much. How long ago did we start using the stars to navigate? I wouldn't imagine it would pre-date agriculture, and can't think evidence we could have to suggest our ancestors from before then used the stars to navigate.
Huh, not sure. If I look at the sky with my left eye without wearing my glasses, I can barely see the stars, but I'm pretty sure I could see predators.