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 this special Nobel Prize edition of Science Talk, the podcast of Scientific American.

I'm Steve Murski.

The Nobel Assembly at Karolinska Institute has today decided to award the 2014 Nobel Prize in Physiology or Medicine with one half to John O'Keefe and the other half jointly to Maidrit Moser and Edward Moser for their discoveries of cells that constitute a positioning system in the brain.

Gorin Hansen of the Nobel Committee.

O'Keefe is at University College London.

He discovered the so-called place cells in the hippocampus in 1971.

The married Mosers are at the Norwegian University of Science and Technology in Trondheim.

In 2005, they found the other component of the brain's inner GPS system, the grid cells.

After the announcement of the winners, Nobel committee member Ole Keen briefly explained

the research.

This year's Nobel laureates have discovered key aspects of an advanced positioning system in the brain and inner GPS.

That makes it possible to know where we are and find our way.

The abilities to know where we are and find our way are essential to our existence.

For example, how can we know we are in a square in front of the concert hall in Stockholm?

And how can we know, how can we find our way from the concert hall to another place in the city?

For example, the city hall.

And how can we store this information so we can find our way the next time we take the same path?

...