The tough thing is figuring out what questions to ask, but […] once you do that, the rest is really easy.

If you're co-founder or CEO, you have to do all kinds of tasks you might not want to do. If you don't do your chores, the company won't succeed. No task is too menial.

We need to be super careful with AI. Potentially more dangerous than nukes.

Weighing too much on someone's talent and not someone's personality. I think it matters whether someone has a good heart.

You could power the entire United States with about 150 to 200 square kilometers of solar panels, the entire United States. Take a corner of Utah... there's not much going on there, I've been there. There's not even radio stations.

I realized that a methane-oxygen rocket engine could achieve a specific impulse greater than 380.

If humanity doesn't land on Mars in my lifetime, I would be very disappointed.