I'm not sure if it's because I'm older and I'm thinking about family more, but I'm trying to set up this thing where I can play in one city for a month, and then write music for a couple months, then play in another city for a month, write music for a month. Just so it's not these two schizophrenic, Jekyll and Hyde kind of things; you don't have to be this monster. You get inspired and you can go write one song from that, and then you go back and play a few shows. If I could've done that in the 90s, I would have.

Maybe it's just a personal thing, but I get so much grounding from Iceland because I know it's always going to be there. I have a very happy, healthy relationship with the country, so it's really easy to go everywhere because I always have Iceland to go back to. It's sort of a contradiction, but that's how it works somehow.

I've never done an album like this. With Biophilia, I was being like Kofi Annan - I had to be the pacifist to try to unite the impossible. Maybe that was a strange, personal job between me and myself, to show how overreaching I was being as a woman. The only way I could express that was by comparing it to the universe.

I love being a very personal singer-songwriter, but I also like being a scientist or explorer.

When I was 20, political music was the uncoolest thing on earth. But when Bush got elected, that was the first time I started actually reading the news.

I mean, I've never been thinking that if you're a fan you have to buy everything that somebody puts out. I mean, you've got a choice. If you don't want it, just don't buy it. It's also a reaction to YouTube and sharing of files. A lot of it is really bad sound, really low quality. So the librarian in me wants it at least to exist there so that in 20 years when I'm sitting in my rocking chair, it will still exist in the best sound quality possible, even though it only sold 1000 units or whatever. As much as I love the whole pirate kind of thing, the quality suffers.

There's no map to human behaviour.