The extension of life beyond Earth is the most important thing we can do as a species.

Land on Mars, a round-trip ticket - half a million dollars. It can be done.

Actively seek out and listen carefully to negative feedback.

Winning 'Motor Trend' Car of the year is probably the closest thing to winning the Oscar or Emmy of the car industry.

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.

I think most of the important stuff on the Internet has been built. There will be continued innovation, for sure, but the great problems of the Internet have essentially been solved.

Biofuels such as ethanol require enormous amounts of cropland and end up displacing either food crops or natural wilderness, neither of which is good.