Facebook is uniquely positioned to answer questions that people have, like, what sushi restaurants have my friends gone to in New York lately and liked? These are queries you could potentially do with Facebook that you couldn't do with anything else, we just have to do it.

I literally coded Facebook in my dorm room and launched it from my dorm room. I rented a server for $85 a month, and I funded it by putting an ad on the side, and we've funded ever since by putting ads on the side.

If you just work on stuff that you like and you're passionate about, you don't have to have a master plan with how things will play out.

We're really at this point where we can take a step back and think about the next big things that we want to do.

I personally don't invest in a lot of companies because I think it would be a conflict of interest and Facebook doesn't typically either.

Why are most chess masters under 30?

People will always want more immersive ways to express themselves. So if you go back ten years ago on the internet, most of what people shared and consumed was text. Now a lot of it is photos. I think, going forward, a lot of it is going to be videos, getting richer and richer.