The general idea of the rich helping the poor, I think, is important.

I think that our progress on key diseases over the next several decades is going to be pretty amazing and so I am very interested in that.

We all know that there are these exemplars who can take the toughest students, and they'll teach them two-and-a-half years of math in a single year.

Certainly I'll never be able to put myself in the situation that people growing up in the less developed countries are in. I've gotten a bit of a sense of it by being out there and meeting people and talking with them.

When you want to do your homework, fill out your tax return, or see all the choices for a trip you want to take, you need a full-size screen.

If people want capital gains taxed more like the highest rate on income, that's a good discussion. Maybe that's the way to help close the deficit.

Harnessing steam power required many innovations, as William Rosen chronicles in the book 'The Most Powerful Idea in the World.'