Fountain of youth' is actually kind of ambiguous - does it mean a way to make everyone healthy and let them live indefinitely? Or are we talking about something that would reset you physically to the way you were in your youth, which for various reasons not all of us would be enthused about?

I've been surprised at the number of people who were really angry that I tried to convey gender neutrality by using a gendered pronoun.

I suspect that we get used to particular sorts of stories being presented in particular sorts of ways, and we're so used to interpreting them and understanding what it is they're doing that we think of those forms and styles as faithful, complete depictions of reality.

Science fiction in particular is often assumed to be about the future, or about some abstract technological or philosophical idea, or just about 'adventure,' but writers can't build worlds out of nothing. We use bits and pieces of the real world to assemble our fictional ones.

We went from a world where almost nobody knew anything about computers to a world where almost all of us are computer geeks for a huge fraction of our day. And I'd like to see that happen with the digital world of biological molecules, too.

But, I think I first got into cars because of an electric car - it was the Tesla. And then, just the fact that they are such high-tech products. There's automated driving. There's battery technology, all the other stuff that goes into it.

Only by developing a deeper understanding of AI systems as they act in the world can we ensure that this new infrastructure never turns toxic.

As long as people are using the Internet, people are going to do stupid stuff, and people are going to do bad stuff. And by the time that robots are sentient, they're going to enslave us anyway, so it won't matter.