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why did we evolve with eyebrows
- Thread starter buttplug
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Guest
theyre completely useless!! why did evolution leave them there?
casavant
New member
Google. It's your friend. Instead of posting this question here (which doesn't bother me, btw), you could have gone to Google and typed what I did: "Why do people have eyebrows?"...and BAM!...answers out the whazoo.
Here ya go- this page offers an explanation and includes other links to answer this nagging question of yours.
http://science.howstuffworks.com//question520.htm
Here ya go- this page offers an explanation and includes other links to answer this nagging question of yours.
http://science.howstuffworks.com//question520.htm
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discussion
Guest
distanced said:
how so?
tuc biscuit
New member
They helr you to detect when things are getting close to your eyes. Also they are vital for looking shocked.
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Guest
distanced said:
cooll, thanks i didnt know that.
ill sit down now
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discussion
Guest
one more question:
how did organisms evolve from asexual to sexual reproduction???
how did organisms evolve from asexual to sexual reproduction???
casavant
New member
Why do we have eyebrows?
by Marshall Brain
Eyebrows are a very significant aspect of our appearance. They are one of the most distinctive features that make up our faces, and we pay a lot of attention to them. We think of some types of eyebrows as attractive and some as unattractive, and many people spend as much time preening their eyebrows as they do applying makeup to their eyelashes or lips. Eyebrows are also one of our most expressive facial features. One of the clearest ways to tell somebody what you're thinking is to simply move your eyebrows up or down -- we all know what different eyebrow positions mean.
So, eyebrows obviously serve a lot of functions in our culture today -- beauty, nonverbal communication, distinctive appearance. But why are they there in the first place? As we evolved and lost most of the thick hair on our bodies, why did we keep that little bit over the eyes?
Scientists aren't entirely sure why we kept this hair, but they have a pretty good guess. We know that eyebrows help keep moisture out of our eyes when we sweat or walk around in the rain. The arch shape diverts the rain or sweat around to the sides of our face, keeping our eyes relatively dry. The most obvious advantage of this is that it lets us see clearly when we're sweating a lot or out in the rain. Without eyebrows, getting around in these conditions is a little more difficult. The shape of your brow itself diverts a certain amount of moisture, but eyebrows make a significant difference in your ability to see. Diverting the sweat away is also good because the salt in sweat irritates the eyes, making them sting a little.
There are a number of ways these qualities might have helped early man survive. 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.
by Marshall Brain
Eyebrows are a very significant aspect of our appearance. They are one of the most distinctive features that make up our faces, and we pay a lot of attention to them. We think of some types of eyebrows as attractive and some as unattractive, and many people spend as much time preening their eyebrows as they do applying makeup to their eyelashes or lips. Eyebrows are also one of our most expressive facial features. One of the clearest ways to tell somebody what you're thinking is to simply move your eyebrows up or down -- we all know what different eyebrow positions mean.
So, eyebrows obviously serve a lot of functions in our culture today -- beauty, nonverbal communication, distinctive appearance. But why are they there in the first place? As we evolved and lost most of the thick hair on our bodies, why did we keep that little bit over the eyes?
Scientists aren't entirely sure why we kept this hair, but they have a pretty good guess. We know that eyebrows help keep moisture out of our eyes when we sweat or walk around in the rain. The arch shape diverts the rain or sweat around to the sides of our face, keeping our eyes relatively dry. The most obvious advantage of this is that it lets us see clearly when we're sweating a lot or out in the rain. Without eyebrows, getting around in these conditions is a little more difficult. The shape of your brow itself diverts a certain amount of moisture, but eyebrows make a significant difference in your ability to see. Diverting the sweat away is also good because the salt in sweat irritates the eyes, making them sting a little.
There are a number of ways these qualities might have helped early man survive. 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.
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Spartacus
Guest
yeah like that Hitlerian character in Pink Floyd's "The Wall"
The Red Dragon
New member
There's a reason for everything. Nothing is truly vestigial 
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Guest
The Red Dragon said:There's a reason for everything. Nothing is truly vestigial
why do guys have nipples?
DeepZenPill
New member
I was doing 20 rep squats tonight and I actually thought of how lucky I was that I have thick eyebrows because they were loaded with sweat.
The Red Dragon
New member
yeah the generic sex is females, it's the Y chromosome that sparks up the testosterone and shit, then there's differentiation. Interestingly enough the concentration of testosterone in fetuses equals the concentration of testosterone in teens/early adults.
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