This episode is presented by eBay.

Rob, everyone loves a deal and a bargain from time to time, don't they? Absolutely, mate. And you know where you can grab a great deal? Talk to me. Where? The eBay app. Yes, you are correct. You didn't need to talk to me. I already knew it. I love eBay. When you're buying, you can discover loads of hidden gems. there's so many items where you think I would have never found that anywhere else.

Then when you're buying, you can discover loads of hidden gems. There's so many items where you think I would have never found that anywhere else. Then when you're selling, it's so simple and most

importantly, free. It's free, Rob. When it's this easy to sell for free and there's great deals

on things you love. You can't help but say when it's eBay. It excludes vehicles and business

sellers.

Welcome to the Scientific American podcast Science Talk posted on June 25th, 2011.

I'm Steve Merski. This week on the podcast.

So Monty never picks door number one, but you know that he'll never pick the door that has the car.

That's Davidei Castilevechi.

He's one of our editors at Scientific American Magazine,

specializing in math and physics,

and he's talking about the infamous Monty Hall problem.

I've been promising you this episode for a while.

Davide wrote about the old Let's Make a Deal conundrum in a recent blog post,

so we decided to delve again into the decades-old poser of whether you increase your chances of winning if you change your original pick from door number one to door number three after

Monty opens door number two. And away we go.

David, what's behind door number one?

We don't know.

That's what we're here for the find.

Why are we examining the Monty Hall problem again,

which was in the news like 20 years ago?

...