I don't want to say specific numbers. But I've certainly spent more than I expected to spend,

I don't spend my time pontificating about high-concept things; I spend my time solving engineering and manufacturing problems.

So we originally expected to make about 35 gigawatt hours at the cell level 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.

There are some important differences between me and Tony Stark, like I have five kids, so I spend more time going to Disneyland than parties.

An asteroid or a supervolcano could certainly destroy us, but we also face risks the dinosaurs never saw: An engineered virus, nuclear war, inadvertent creation of a micro black hole, or some as-yet-unknown technology could spell the end of us.

Our approach has been to take no chances whatsoever.