As we get robots becoming more sophisticated, I think we should worry sooner rather than later on how much they could take over, but I think it'll mostly be a positive thing. In terms of deadlines it won't be any worse than nuclear weapons.

The Internet is becoming the town square for the global village of tomorrow.

Playing Bridge is a pretty old fashioned thing in a way that I really like... I do the dishes every night - other people volunteer but I like the way I do it.

For Africa to move forward, you've really got to get rid of malaria.

If somebody is considering being willing to go out and work in the field in global health, those are a particular class of heroes because it's hard to work in those places. Our foundation gets so many of our learnings from people who've been out there and seen, "this tool is not going to work there, there's more of a problem here than you know." You should really get involved in that.

Fortunately for India, it has got a growing economy. If it is doing the right things with taxation and focusing on the right areas for human development, it is going to have no problem, over a period of time, taking care of its own needs.

The nuclear approach I'm involved in is called a traveling-wave reactor, which uses waste uranium for fuel. There's a lot of things that have to go right for that dream to come true - many decades of building demo plants, proving the economics are right. But if it does, you could have cheaper energy with no CO2 emissions.