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 seven days starting December 3rd, 2008.

I'm Steve Merski. If you hate pain,

you'll love this week's program. We'll talk with pain expert Sean Mackie, plus we'll test

your knowledge about some recent science in the news. A few weeks back, I was at a conference

for journalists called Science Writers 2008 at Stanford University. One of the speakers was Sean Mackie.

He's a former engineer who then went to med school and is now associate professor and chief

of the pain management division of the Stanford University Medical Center.

He's also the director of the Stanford Systems Neuroscience and Pain Lab.

...