People often mistake technology for a static picture. It's less like a picture and more like a movie. It's the velocity of technology innovation that matters. It's the acceleration.

You could warm Mars up, over time, with greenhouse gases.

It's a fixer-upper of a planet but we could make it work.

A Prius is not a true hybrid, really. The current Prius is, like, 2 percent electric. It's a gasoline car with slightly better mileage.

We need to figure out how to have the things we love, and not destroy the world.

The United States is definitely ahead in culture of innovation. If someone wants to accomplish great things, there is no better place than the U.S.

Don't be afraid of new arenas.