Eyebrows why do we have

Being able to see more clearly in the rain could certainly help you find shelter , and there are several circumstances when keeping the sweat out of your eyes could save your life. If you were trying to outrun a predator, for example, it's a good bet there would be a lot sweat running down your face.

If all that sweat flowed right down into your eyes , you wouldn't be able to see that well, and your eyes would be irritated, which would certainly impair your ability to escape! Because of this slight survival advantage, nature would most likely select for humans with eyebrows over humans without eyebrows.

Most scientists are inclined to believe that if we didn't have eyebrows, something else would have evolved to help the situation. For example, humans could have developed incredibly thick eyelashes to shield out excess sweat or rain. Or, our skulls could have continued to protrude so that they formed a ledge above our eyes -- rain or sweat would then drop from that ledge straight away from our faces, without going in our eyes.

Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. They have evolutionary advantages.

Eyebrows keep sweat, dirt, rain, and other debris out of our eyes, so we can see more clearly. In that sense, eyebrows keep us safe. When something is wrong in our bodies, symptoms appear. Hair loss is a sign of issues like hyperthyroidism. While the loss of other body hair may not be as obvious, eyebrow loss is more noticeable.

People also often rub their eyebrows in response to stress, causing patchy spots. Eyebrows and the evolution of human communication are intrinsically linked. Originally, we had prominent brows that looked intimidating. As we began living in larger and more diverse groups, we needed to communicate differently.

Losing our brow ridge gave us more flexible eyebrows. Brain and facial changes might have triggered this shift, but the result was more subtle and friendlier communication. This was advantageous as we needed good relationships with other humans to survive.

As humans, a lot of our communication is non-verbal. Eyebrows play a big role in microexpressions. When someone is afraid, the eyebrows also go up but pull together more. And older people, like our grandparents, can have tired or droopy looking eyebrows. Read more: Curious Kids: why do older adults get shorter? Since ancient Egyptian times, people have linked eyebrows with beauty.

Men and women used to paint on dark, arched eyebrows with a black powder to show respect to Egyptian gods. Eyebrows were also thought to give people supernatural powers! Read more: Friday essay: shaved, shaped and slit - eyebrows through the ages. Even today, people tweak the look of their eyebrows. They can remove hairs by tweezing or waxing.

They can even dye their eyebrows or tattoo them. So, next time you look in the mirror, take a closer look at your eyebrows. They also play a big part in what you look like and who you are.

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