From the brains behind brains on, this is the moment of um.

Answering those questions that, and uh, uh,

uh, uh, uh, uh, uh, uh, uh, uh, uh, and uh, uh, and uh, Welcome to your moment of um from a.

from a p m

studios i'm Anna Goldfield

when you look in the mirror what do you see eyes and nose, chin, and two random caterpillars floating on your forehead.

Eyebrows, what are they doing there?

Why is their hair above our eyes?

Why do they move? What is even going on up there?

We've gotten a bunch of great questions about eyebrows including this one.

Hello, my name is Philip, and I'm six years old.

And my question is, how do my eyebrows move?

Some people argue that eyebrows might be important

to stop sweat coming down over your eyes,

but they wouldn't be the shape they were or have the maneuverability that they have.

So we think has much more to do with social things. Our eyebrows are evolved and they function to tell other people how we're feeling. My name's

Penny Spikens. I'm a professor of the archaeology of Human Origins at the

University of York in the UK. The feud said to me, like, why do we have a nose,

or why do we have a mouth, or why do we have our eyes?

Then we kind of know the answer to that, don't we?

Like, we see with our eyes, we breathe with our nose, we eat with our mouth,

but our eyebrows, they seem to come in a different kind of thing. We're not quite sure what they are for.

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