Over time I think we will probably see a closer merger of biological intelligence and digital intelligence.

With artificial intelligence, we are summoning the demon. You know all those stories where there's the guy with the pentagram and the holy water, and he's like, yeah, he's sure he can control the demon? Doesn't work out.

If you look at space companies, they've failed either because they've had a technical solution where success was not a possible outcome, they were unable to attract a critical mass of talent, or they just ran out of money. The finish line is usually a lot further away than you think.

Silicon Valley has evolved a critical mass of engineers and venture capitalists and all the support structure - the law firms, the real estate, all that - that are all actually geared toward being accepting of startups.

As a global society, we have the technology, resources and the know-how to make a massive difference to living standards everywhere, including for refugees.

Gold has worked for thousands of years, but now with the Internet, it works even better.

My body really, really wanted to reproduce when I was 15. It took a lot of civilization, socialization, willpower and some emulsion polymerization technology for me not to reproduce at 15.

I'd like to think my company HootSuite is anything but a stodgy old-boys' club. As a social media company, our employees are by and large young, progressive and open-minded.