/u/JSPark13258's posts
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Assuming no wind, how cold does something have to be to instantly (or within a few seconds) cause frostbite on human skin?
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In medieval times, during the Age of Sail, if there were no stars in the night at all, what are some navigational methods sailors might have used that would be valid?
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Why do we have eyebrows? Alternatively, if prominent brows were useful, why did they shrink? Also, why does hair grow on them?
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