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 Science Talk, the weekly podcast of Scientific American for the week of March 13th, 2009. I'm Steve Merski. And I'm just

back from 11 days at sea on a scientific American lecture cruise with Insight Cruises.

Because this is Darwin's big anniversary year, the cruise featured a faculty of evolutionary

biologists, as well as cognitive scientists who will hear from in future episodes.

This week, though, we talked to Jerry Coyne, who gave a series of lectures on the ship.

He's professor of ecology and evolution at the University of Chicago,

and the author of The New York Times Bestseller Why Evolution is True.

We spoke on March 8th in his state room on the Holland

America ship, the Ziterdam. In the last chapter of your book, you tell this story at the

beginning where you've just spoken to a group of businessmen, and one of them comes up to you

...