I'm quite a curious person. I don't mind being the one who doesn't know things, a role I often play in QI.

The principle that light can be in two places at the same time is absolutely extraordinary.

I'm more inclined to linger in the science pages of 'The Week' magazine. But my principle obsessions are still watching sitcoms and football.

I liked the idea of all of humanity fitting inside a sugar cube because more than 99.9% of matter is space.

I'm not a great shopper but I do buy a lot of books. I'm the publishers' friend - I buy a hundred books a year and read four.

There's a lot to do when you're a kid - spiders to catch, girls to poke in the eye - stuff to be getting on with.

I like pubs too, but it's hard for me to go and get proper bladdered in the way I used to. I don't want to moan about being recognised but I do get a bit of grief sometimes.