This episode is brought to you by Cancer Research UK.

Imagine this. Inside all of us, billions of cells follow millions of instructions

written in microscopic code. And when a new cell grows, it copies those instructions,

but the smallest error can lead cancer to develop.

Right. And this is the reason why there isn't a single cure for cancer, because, you know,

there are more than 200 different types. Each of them have got different distinct characteristics,

you know, different challenges, different mysteries. And that means that trying to cure cancer isn't

like following a single path. It's like trying to map out an entire forest. That's right. And Cancer

Research UK is the world's largest charitable

funder of cancer research. I mean, their work spans more than 20 countries with over 4,000

scientists, doctors and nurses pushing knowledge forward to save and improve lives worldwide.

You know, over the last 50 years, the work that this charity has done has helped to double cancer survival in the UK.

And you have to think about that is more parents at the dinner table, right?

That is more friends at their birthday parties.

That is more people who are living longer, better lives.

For more information about Cancer Research UK, their research, breakthroughs, and how you can

support them, visit cancer research, UK.org forward slash rest to science.

Hello and welcome to The Rest is Science.

I am Michael Stevens.

And I'm Hannah Fry. And today we're going to get a little bit splashy, a little bit wet. No, but we are going to talk about something that's wet. Water. Hang on. Are you sure water's wet? Actually, I'm not so sure. This is quite a big question. It's a very memed question. Is water wet? I have an opinion on it, do you? I, in McQuin, you tell me yours. Okay, what I think is that one molecule of water dry. Okay. Once there's more, it's soaking wet. Soaking wet. Yeah. Well, hold on, we should say first about why this is a memed question, right? Because it's like water itself, the things that it touches are wet, but is the water itself wet?

Yes, that's right. Water makes things wet. But water on its own, would you call it wet? I would because I think water can wet itself.

Wetness is about intermolecular forces on water attracting themselves onto some other material. Okay. That other material, in my opinion, could be another water molecule. So just the

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