Welcome to the rest of science. I'm Hannah Frye. And I'm Michael Stevens. I think there comes a point

in every child's life where they ask what's beyond the stars, right? How big does it get? In that regard,

I mean, they're kind of similar to every human who's ever lived, right? Where does it end? Does it end, Michael?

Does it end? And what if it doesn't? And what if it doesn't? But what if it does?

Because there's like a strange thing going on here. If you say, no, it's finite. The universe is finite. Well, then it has to be bounded by something. And then what about that thing? Is that infinite or is that finite? Because if that's finite,

then that has to be bounded by something. And then so on and so on and so on and so on.

I know. If there's a boundary, what bounds the boundary?

What bounds the boundary? Right. And this is all happening in our heads. Like no matter

how rational you try to be about explaining that something

ends, I can always go, I disregard that and it continues. In my imagination, with this

piece of meat up here, this like wet, squirting computer, I can go now, forever, beat that.

So that is what we are talking about today.

We are talking about whether there is a bound to the universe, whether there is a bound

to our thoughts, whether infinity actually exists, or where there is all a complete figment

of Michael's squishy wet computer in his head.

This This is squishy wet computer in his head. This episode is brought to you by Cancer Research, UK.

If you wanted to type out the entire human genome,

you would have to type at 60 words a minute for eight hours a day for about 50 years.

Okay, that's the scale of the DNA rulebook inside each one of your cells, telling it when to grow, when to divide, and when to stop.

And different tissues read that same rule book in different ways.

So a skin cell doesn't behave like a lung cell.

And cancer can begin when those instructions change,

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