As a child I would just question things.

You need to be in the position where it is the cost of the fuel that actually matters and not the cost of building the rocket in the first place.

Yeah, well I think anyone who likes fast cars will love the Tesla. And it has fantastic handling by the way. I mean this car will crush a Porsche on the track, just crush it. So if you like fast cars, you'll love this car. And then oh, by the way, it happens to be electric and it's twice the efficiency of a Prius.

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.

I'm increasingly inclined to think there should be some regulatory oversight, maybe at the national and international level just to make sure that we don't do something very foolish.

The reason we should do a carbon tax is because it's the right thing to do. It's economics 101, elementary stuff.

The future of humanity is going to bifurcate in two directions: Either it's going to become multiplanetary, or it's going to remain confined to one planet and eventually there's going to be an extinction event.