Ah, Benny's parents, thanks for coming.

Hiya.

So, Benny has really blossomed this term.

You're telling me, he outgrew his bike. We sold it, on eBay.

Oh, that's not quite what I meant.

It's free to sell on there?

Free to sell?

Easy too. Sold Benny's bike, your guitar, my jacket.

You sold my guitar?

Shall we talk about Benny?

When it's this easy to sell for free, you can't help but say when it's eBay.

Things people love.

T's and Cs apply, exclusive vehicles.

Welcome to Scientific Americans' Science Talk posted on June 2nd, 2015.

I'm Steve Murski. On this episode...

So at a certain point in about the 50s, people realized that mathematics itself had become so complicated that it needed its own theory of how it worked.

That's mathematician Eugenia Cheng. She's tenured in the School of Mathematics and Statistics at the University of Sheffield in the UK.

She's currently scientist in residence at the School of Sheffield in the UK. She's currently scientist

in residence at the School of Art Institute of Chicago. And she's the author of the new book

How to Bake Pie, spelled P.I., you know, the number pie, an edible exploration of the

mathematics of mathematics, which means that she's in the branch of math called Category Theory,

which you'll be hearing more about.

...