Greg Jenner

I'm a public historian, author and broadcaster.

And today we are grabbing our maths textbooks and frolicking back to the fourth century to Egypt to learn all about mathematician and philosopher Hypatia of Alexandria.

And to help us, we have one terrific teacher and one sublime student in History Corner.

She's Professor of Classics at Durham University.

You might have heard her on Natalie Haynes' Stand Up for the Classics or Great Lives on BBC Radio 4.

Maybe you've read one of her many books, including Aristotle's Way, How Ancient Wisdom Can Change Your Life and Facing Down the Furies.

And you'll know her from our episodes on Pythagoras, The Triangle Guy and Aristotle.

It's Professor Edith Hall.

Welcome back, Edith.

Hello, I'm thrilled to be here.

Delighted to have you back.

And in Comedy Corner, she's a comedian, writer and actor.

You'll have seen her on Mock the Week, QI, Frankie Boyle's New World Order, Late Night Mash.

Or you've heard her co-hosting the BBC's funny technology podcast, Human Error.

Maybe you've seen her award-nominated stand-up show, Olga Koch Comes From Money.

And you'll definitely remember her from our episodes on Yvonne the Terrible and Vital Electricity.

It's Olga Koch.

Welcome back, Olga.

Delighted to have you here.

Olga, previously on the show, you said that your history knowledge is basically all the American presidents, and that's it.