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We love having you either way. Hi, I'm Lindsay.

And I'm Marshall. Welcome to Tumble, the show where we explore stories of science discovery.

Today we're asking, what's dark matter?

I think that's easy. Just take some matter, put it in the closet, and turn off the light.

Then it's dark.

That's not what it is.

Dark matter is something that we can't see, but it shapes the universe in ways that we want to understand.

In this episode, we'll be traveling into a laboratory deep within a mountain to try and find it.

Today's question comes from a bilingual, humble and espional listener.

Hello, my name is Geronimo, and I'm from Mexico City.

My question is, what is dark matter? Oh, I'm excited about this one. I don't

really know what dark matter is either, and maybe nobody does. I mean, what is matter to like the

light kind anyway? Well, matter is basically stuff. Anything that has weight or takes up space is matter. Sure. But scientists think

there's much more matter in the universe than we can see. They estimate that 85% of all matter

is dark. Oh, well, so what's dark? Well, let's hear Hieranamo's idea of what dark matter might be.

I think that the material is like a force most scura.

So he's saying that he thinks dark matter is like a very dark force,

...