That to get better night vision you should keep one eye closed in daylight and then open it in darkness and that eye will then be able to see better in the dark. Pirates knew this and wore an eye patch, not because they had anything wrong with their eye, but because they frequently had to move above and below decks, from daylight to near darkness, and could just switch the patch to the other eye and see easily in the dark.
That drinking beer actually helps strengthen your bones and teeth because it gives you a healthy dose of silicon.
That up to 70% of people have experienced the hypnic jerk, the falling sensation that wakes you up abrupty as you fall asleep.
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