The largest newspaper in the United States is only reaching 1 percent of population. We are kind of assuming that 'Wall Street Journal,' 'USA Today,' and other newspapers are very important. Yes, they're extremely important, but only to 1 percent of the population on a daily basis.

Fundamental physics is like an art more or less. It's completely non-practical, and you can't use it for anything. But it's about the universe and how the world came into being. It's very remote from your daily life and mine, and yet it defines us as human beings.

Facebook can be an accumulation of different intelligences.

Facebook didn't know how successful Zynga would be.

I must analyze, from what I do now, what will be the impact two or three or five years in the future. What is the statement I want to make?

Facebook is at the forefront. It's the company that can fundamentally change the way information is being exchanged and processed. It can be the basis for artificial intelligence to develop over time.

It is hard to think of practical applications of the black hole. Because practical applications are so remote, many people assume we should not be interested. But this quest to understand the world is what defines us as human beings.