Hey, brainiacs, I'm Cristen Conger
from "Stuff Mom Never Told You" here to tell you
about why human beings have eyebrows.
Because look at them!
Take a close look?
Aren't they just ridiculous-- and very well manicured.
Now, scientists aren't entirely sure why we have this hair,
but they have a pretty good guess.
The arch shape of the eyebrow diverts the rain or sweat
around to the sides of our face, keeping
our eyes relatively dry.
And the most obvious advantage of this
is that it allows us to see clearly,
even when we're sweating a lot like on a first date
or when we are out in the rain, like when
we're standing outside of someone's house screaming
for them to come on a date with us
and they then called the cops.
[THUNDER]
Diverting the sweat away is also good, because the salt in sweat
irritates the eyes.
Just to test things, I shook a salt shaker into my eye.
And just take it from me, it burns like hellfire.
Eyebrows are a very significant aspect of our appearance
as well.
They're one of the most distinctive features
that make up our faces.
And we pay a lot of attention to them.
I, for instance, was two hours late
to make this video, because I had to preen my eyebrows.
See?
And my eyebrows go up to here if I let them.
Now, eyebrows are also one of the most expressive
facial features.
One of the clearest ways we're telling somebody what we're
thinking is to simply move our eyebrows up and down like this.
That means you're cute.
Now this means I ain't buying it.
And this means it's hard for me to raise my left eyebrow.
And also I've got to poop.
Keeping it classy.
But what if we did not have eyebrows?
Scientists have thought about this as well,
and they think that if we didn't have eyebrows,
we would have instead gotten long,
thick, snuggleupagus-style eyelashes, as well a far
protruding forehead, which could have been
kind of useful, because we could put our keys up there.
We could put deodorant.
Small pizzas, mini cupcakes, my purse
when I'm not holding it to free up my hands when I'm typing.
Now rain or sweat would then drop from that ledge
straight away onto our faces without it
getting into our eye.
So way to go, evolution, for not making us look dummies.
Now don't you be a dummy.
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