We're developing two engines. These are state-of-the-art, world-class, world-beating engines. These are not just sort of ho-hum engines.

When I was in college, I wanted to be involved in things that would change the world.

I'm trying to construct a world that maximises the probability that SpaceX continues its mission without me.

I'm interested in things that change the world or that affect the future and wondrous, new technology where you see it, and you're like, 'Wow, how did that even happen? How is that possible?'

Silicon Valley has some of the smartest engineers and technology business people in the world.

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.