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.

I was born in Africa. I came to California because it's really where new technologies can be brought to fruition, and I don't see a viable competitor.

Even if producing CO2 was good for the environment, given that we're going to run out of hydrocarbons, we need to find some sustainable means of operating.

I started SpaceX with the expectation of failure.

It's obviously tricky to convert cellulose to a useful biofuel. I think actually the most efficient way to use cellulose is to burn it in a co-generation power plant. That will yield the most energy and that is something you can do today.

Does the logic connect? What are the range of probably outcomes? You want to figure out what those probabilities are and ideally be the House. It's fine to gamble, as long as you're the House. Also, listen to critical feedback, particularly from friends. Generally they will be thinking it but they won't tell you.

The revolutionary breakthrough will come with rockets that are fully and rapidly reusable. We will never conquer Mars unless we do that. It'll be too expensive. The American colonies would never have been pioneered if the ships that crossed the ocean hadn't been reusable.