Freakonomics: Eat and Tweet

In this episode of Freakonomics Radio, we explore the tension between "slow food" - a return to the past - and the food future. You'll hear from slow-food champion Alice Waters and uber-modernist Nathan Myhrvold, who advocates bringing more science into the kitchen - including, perhaps, a centrifuge, a pharmaceutical freeze drier and a... food printer?

Also in this episode: we delve into the social mores of Twitter. Is it a two-way street? Do you have to follow someone on Twitter to garner a large following yourself? Or are the mores of digital friendship different from those in real life? Twitter is a tool that has created a funny kind of friendship -- one that's less social than most people think. We'll hear about the Twitter give-and-take from sociologist Duncan Watts. Also, Justin Halpern parleyed his hit Twitter feed "Sh*t My Dad Says" into a best-selling book and a TV show; we learn about the one guy he follows. And Steve Levitt weighs in on just how important (or not) Twitter is in his life.