On the supply side, for innovation, you'd say, go look at those R&D budgets, and they haven't moved in the last 20 years. In the case of the US - which is the majority of R&D funding across every category you can name: health, energy, whatever - it's been about $5 billion a year from the Department of Energy.

Paul and I, we never thought that we would make much money out of the thing. We just loved writing software.

There are GMO skeptics more in Europe maybe than in other places, but not exclusively.

In programming when you're making a change you have to know all the affected places, and you have to be able to model in your head what the performance impact will be.

As I look forward, I'm very optimistic about the things I see ahead.

(On being the world's richest man) I wish I wasn't ... There's nothing good that comes out of that. You get more visibility as a result of it.

My dream is that every child has enough food to eat, good medical care, and the chance to go to school and even attend college.