David Leigh: 'I wish I'd known you get graphene off pencil marks!'
Catenane wizard talks magic, cards and angry music
Magic teaches you, when you’re a chemist, that even if you know what you have at the start and the end of an experiment, you don’t really know what’s happened in between. It is a reminder that there may be other things going on and we are always extrapolating from just a few known facts.