There's an entire universe in every single tweet, and it all really depends on the content as far as how it's going to spread.

I was fascinated with jeans, because you can impress your life upon the jeans you wear. The way you sit imprints on the jeans.

There's an entire universe in every single tweet, and it all really depends on the content as far as how it's going to spread.

Those words are from Lynda Barry's novel 'Cruddy.' I've carried them with me for some time. There's a lot in my life I wasn't expecting. One is the realization that I stood at this pulpit and delivered a reading for my own graduation...15 years ago. Unexpectedly, I'm old.

Anything you're interested in the world whether it be Charlie rose or JetBlue or a public figure or your local coffee shop, they're on Twitter and broadcasting what is interesting to them.

Twitter has been my life's work in many senses. It started with a fascination with cities and how they work, and what's going on in them right now.

It's empowering to be asked to look at what's possible, not told how to do it.