What most people know but don't realize they know is that the world is almost entirely solar-powered already. If the sun wasn't there, we'd be a frozen ice ball at three degrees Kelvin, and the sun powers the entire system of precipitation. The whole ecosystem is solar-powered.

I've actually made a prediction that within 30 years a majority of new cars made in the United States will be electric. And I don't mean hybrid, I mean fully electric.

I just want to retire before I go senile because if I don't retire before I go senile, then I'll do more damage than good at that point.

Being an entrepreneur is like eating glass and staring into the abyss of death.

I'd like to dial it back 5% or 10% and try to have a vacation that's not just e-mail with a view.

You need to live in a dome initially but over time you could terraform Mars to look like Earth and eventually walk around outside without anything on. ... So it's a fixer-upper of a planet.

People work better when they know what the goal is and why. It is important that people look forward to coming to work in the morning and enjoy working.