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.

Facebook can be an accumulation of different intelligences.

Facebook didn't know how successful Zynga would be.

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

I have this ratio that if you divide age of entrepreneur by market cap of company. For Facebook it's one. Every year of his life Zuckerberg has been making $1 billion for investors.

I'm just focused on exploring new opportunities.

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.