The purest case of an intelligence explosion would be an Artificial Intelligence rewriting its own source code. The key idea is that if you can improve intelligence even a little, the process accelerates. It's a tipping point. Like trying to balance a pen on one end - as soon as it tilts even a little, it quickly falls the rest of the way.

By far, the greatest danger of Artificial Intelligence is that people conclude too early that they understand it.

Anything that could give rise to smarter-than-human intelligence - in the form of Artificial Intelligence, brain-computer interfaces, or neuroscience-based human intelligence enhancement - wins hands down beyond contest as doing the most to change the world. Nothing else is even in the same league.

There's a popular concept of 'intelligence' as book smarts, like calculus or chess, as opposed to, say, social skills. So people say that 'it takes more than intelligence to succeed in human society.' But social skills reside in the brain, not the kidneys.

I think we are at the very beginning of high changes, not only in terms of digital film, but in the way the movies will be screened, whether they'll be screened on phones, on computers - on everything.

There is an enormous market demand for information. It just has to be fulfilled in a way that fits with the technology of our times.

Does Facebook act as though I own my online life, or as though it does? Concretely: Can I control what data it shares with other users, with advertisers, and with business partners?

We have to examine very carefully any privacy-reducing technology.