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.

People were wondering, "How do you even do food e-commerce? Are we going to be dropping strawberries on somebody's doorstep? It doesn't feel like we're going to be doing that". But what we believed is that in the US pickup might work. So we started in California and then Denver, and a team started working to put everything in place to do grocery pickup and in the beginning we even had a separate app. It was an orange online grocery app.

So we originally expected to make about 35 gigawatt hours at the cell level [solar] and about 50 gigawatt hours at the module or pack level. Now we are expecting to do about 150 gigawatt hours in the same volumetric space as the original design.

If we drive down the cost of transportation in space, we can do great things.

Nuke Mars refers to a continuous stream of very low fallout nuclear fusion explosions above the atmosphere to create artificial suns. Much like our sun, this would not cause Mars to become radioactive.

Self-driving cars are the natural extension of active safety and obviously something we should do.