Entrepreneurship is like eating glass and walking on hot coals at the same time

I think it matters whether someone has a good heart.

You could warm Mars up, over time, with greenhouse gases.

I do love email. Wherever possible I try to communicate asynchronously. I'm really good at email.

A battery by definition is a collection of cells. So the cell is a little can of chemicals. And the challenge is taking a very high-energy cell, and a large number of them, and combining them safely into a large battery.

The future of humanity is going to bifurcate in two directions: Either it's going to become multiplanetary, or it's going to remain confined to one planet and eventually there's going to be an extinction event.

It's OK to have your eggs in one basket as long as you control what happens to that basket.