Welcome to brain stuff from how stuff works. Hey, brain stuff, it's Christian saga, and I'm here to tell you why human beings have eyebrows, because look at them. Take take a clus look, go over to the mirror. Look, aren't they just ridiculous? I mean, they're also very well manicured, but they're also ridiculous. 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 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're out in the rain or something like we're standing out of somebody's house screaming at them to come out for our first date with us, but then they call
the cops. All right, never mind. Diverting the sweat away is also good because the salt in sweat irritates our eyes. But just to test things, I shook a salt shaker into my eye and take it from me. It burns like hell fire. 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 and look. 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. But what if we
didn't have eyebrows. Scientists have thought about this as well, and they think that if we didn't have eyebrows, we would have gotten instead these long snuffle luck bagus style eyelashes, as well as far protruding foreheads, which could have been kind of useful because we could put things up there, I don't know, like like our keys, but rain or sweat would then drop from that ledge on our face straight away down onto the rest of our face without getting into our eyes. So all right, way to go
evolution for not making us look like that. Check out the brainstuff channel on YouTube, and for more on this and thousands of other topics, visit how stuff works dot com.