Hi, we're here from curiosity.com to help you get smarter in just a few minutes.

I'm Cody Gough.

And I'm Ashley Hamer.

Today you learn about the strangely named theorem that explains why there's always a storm brewing

somewhere.

New research into how you can practice more effectively,

and why there are safer ways to be eco-friendly

than by reusing your disposable water bottle.

Let's reuse some curiosity.

You know how the hair on your head doesn't all grow in the same direction?

Well, there's a scientific principle that says the same goes for wind on the earth.

In fact, this bizarrely named theorem says it's impossible for wind or hair to all move in the same direction on a sphere like the Earth.

It's called the Harry Ball Theorem, and it has surprisingly far-reaching implications.

This theorem comes from a field of mathematics called topology,

which deals with the properties of an object that you can't change

by deforming it.

It essentially says that for any shape that can be morphed into a

sphere and is fully covered in hair, there will always be one point where the

hair stands straight up. Of course this theorem doesn't really apply to the hair on your head because hair doesn't cover your entire head.

That's why the fawns could easily comb all his hair in the same direction.

But the Earth's atmosphere covers every bit of its surface.

So the Harry Ball theorem definitely applies to our planet.

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