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.

It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we say about Nature.

Empty heads, cognitive science has taught us, learn nothing. The powerful cultural and personal flexibility of our species is owed at least in part to our starting off so well-informed; we are good learners because we know what to pay attention to and what questions are the right ones to ask.

After briefly considering whether to study biology or medicine, I opted for medicine and initiated my studies at the University of Bonn. The first two years were particularly hard, since I simultaneously decided to attend lectures and courses in biology as well.

You look at science fiction and look how often it talks about being alien, being alienated about the other. Look at the number of blue people - 'Avatar,' I'm looking at you. And it is now easier to find people of color in science-fiction literature and media, but the issues of representation are still really, really troubling.