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 August 29th. I'm Steve

Mercky. This week on the podcast, we'll hear a little more from Alan Wiseman, author of the

bestselling book The World Without Us, which is at its core gigantic thought experiment,

what would happen if human beings suddenly disappeared. And we'll talk to Scientific American

editor-in-chief John Rennie about some big doings at the magazine. Plus, we'll test to Scientific American Editor-in-Chief John Rennie about some

big doings at the magazine. Plus, we'll test your knowledge about some recent science in the

news. First up, Alan Wiseman, you may have seen him on the Daily Show with John Stewart last

week. We aired most of my phone interview with him on the June 27th podcast, but there was some

interesting stuff we didn't have time for in that episode.

...