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 C's Apply, Exclusive vehicles.

Welcome to Science Talk, the more or less weekly podcast of Scientific American posted on March 30th, 2010. I'm Steve Merski. This

week on the podcast, we all know time. We use it all every day, all the time. But it's not that

many steps to go from the time that we use to unanswered questions about the universe.

That's Sean Carroll, author of the new book, From Eternity to Hear, the quest for

the ultimate theory of time.

We'll talk to him about the book, and we'll test your knowledge of some recent science

in the news.

First, Sean Carroll, he's a theoretical physicist at the California Institute of Technology,

where he studies cosmic inflation, the arrow of time, and what happened at or before

...