The hardware and the software used in the Breakthrough project will be compatible with other telescopes around the world, so they too can search for intelligent life.

Facebook can be an accumulation of different intelligences. Ask a question, translated into many languages and somebody, somewhere in the world, will have an answer.

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?

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.

I am not an oligarch. I am a servant and I try to align my interests and those of my investors.

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.

The company that creates one global social graph will be very important going forward. It will be Facebook, with maybe 2-3 local social networks able to sustain competition long term.