Eyebrows serve multiple functions, including:
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Protecting the eyes from moisture and light: Eyebrows help keep the eyes clean and clear by moving wetness from sweat and rain away from the eyes, directing it towards the side of the head. The shape of the brows arch and the outward-growing hairs of the brows channel sweat, rain, and moisture away from the eyeballs, ensuring clear vision.
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Reducing the amount of light that gets into the eyes: Eyebrows can also help in reducing the amount of light that enters the eyes, acting as a natural shade.
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Keeping dirt away from the eyes: Eyebrows help in preventing debris, such as dust, from entering the eyes and potentially causing irritation or damage.
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Facilitating nonverbal communication: Eyebrows are an important part of human expression and communication, allowing us to show our emotions. One raised eyebrow can express skepticism or interest, while two raised eyebrows can indicate surprise. Eyebrows play a role in conveying happiness, surprise, and anger.
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Acting as an ID card: Eyebrows stand out against the forehead, can be clearly seen from a distance, and don't change much over time, making them useful for identifying people.
