Have you ever noticed a tiny pinprick-sized hole in front of yours or your friend's ear? Turns out it's not the remains of an old piercing—it's technically a genetic defect, though one with virtually no detrimental effects. Turns out this tiny hole, called preauricular sinus, could be a holdover from our ancestors with gills.
Why Do Some People Have An Extra Hole In Their Ear?
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Written by Curiosity Staff April 28, 2017
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