It has not been possible to scientifically explain why we humans are equipped with eyebrows. It is most likely that they had a practical purpose, but they, together with the eyelashes, prevent sweat, rainwater and dirt from entering the eye.
Various things seem to indicate that the eyebrows are intended to protect the eyes, but it can be noted that all the hairs face outwards. In this way, the eyebrows automatically lead sweat and rainwater away from the area around the eyes.
Interpret feelings
In addition to this role that has been mentioned here, it can be assumed that eyebrows also play the role of enhancing the expression of the face.
As humans, our ability to get by depends largely on our ability to communicate, and to that end, facial expressions are crucial.
The lid muscle of the eye and the skin muscle of the forehead meet under the eyebrows, which become extremely flexible as a result and can express and interpret a myriad of emotions.
Natural selection, according to Darwin’s theory, has also determined that we kept our eyebrows despite losing our fur.
It should be noted that the hair on the eyebrows is renewed every five months. These hairs and eyelashes are the most frequently renewed hair on the human body.
For comparison, the hairs on our head last for a brisk three years.
