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.

Science is one of a handful of things that defines us as a very special species. It is amazing how far we have been able to get and how accurate our predictions are. I think understanding how the universe was born is very important. It really gives us a perspective on many things.

The polling of Internet users shows that friends recommendations are the most reliable driver behind purchasing decisions. Right now that market is largely untapped. Facebook and other social networks can allow that to happen.

I have invested in four social networks. More than any other. But that's in Russia and Poland.

The problem is that modern fundamental physics is so far from you and me. The mathematics has become so much more complicated that you need at least 10 years to understand it. Fundamental physics has advanced so far from the understanding of most people that there is really a big disconnect.

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.

There is a significant momentum behind the social Internet. A wide range of public investors were very enthusiastic about that.