The thing that keeps me most awake is the desire and curiosity to learn more.

It's such an extraordinary time to be alive that you just don't want to miss it. I mean, it's a really neat historical period.

When you brought the Industrial Revolution in, all of a sudden India and China went from being the dominant global powers to being powers dominated by those who understood how to apply this new technology.

Cities are magical things. You know the energy in them. You have to walk the streets in any borough here and you can see between what was in this city in the 1970's and where it is today and how much more energy there is and how much more just sheer.

We're beginning to enter an era where it gets really cheap and really fast to begin to do things like make fuels, and make textiles, and make extra teeth for ourselves. And we're beginning to think about how we regrow our bladders.

There are few jobs in the world that are more fun than being the head of Urban Development for a great and thriving city.

Those of us of a certain age grew up expecting that by now we would have Rosie the Robot from 'The Jetsons' in our house. And all we've got is a Roomba.