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

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 thing I'd really like to see is the old London Bridge, with all the old buildings around it like Shakespeare's Globe. I'd like to walk along that. Don't worry, I won't get drunk and fall in.

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.

A bambiraptor is a savage baby dear.

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

A foolproof plan for not getting a job - show up for your interview wearing flip flops.