I understand why we have eyelashes, but why do we have eyebrows?
by 
Mystical Dim
ANSWERS: 9
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Keeps down the glare of the sun and deflects some sweat from running into our eyes.
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So cosmetic companies can sell us a lot of crap to take care of them
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To channel sweat off to the sides so it doesn't get in our eyes very much.
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If allowed to grow they direct rainwater flowing down your brow aside, so it interfere less with your vision.
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So that you can use them when making facial gesters.
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Beause the eyes looks bigger and the shape of the eyes is visible.
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We need awnings for our eyes to protect them from the elements.
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To stop sweat running in eyes?
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3 basic reasons: 1) Additional sun shielding (small effect but over a lifetime can add up). 2) Acting as a barrier to sweat. 3) Aiding with non-verbal communication (we use our eyebrows for this much more than you might suppose).
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