We have no idea: a guide to the unknown universe

When you’re sitting at breakfast giggling over a book and are asked what you are reading, admitting it’s a physics book about unanswered questions will initially earn you some blank looks. I recommend clearing things up by explaining that you were simply surprised, and amused, by the fact that the mass of a llama doesn’t correspond to the mass of all the parts of a llama if you chopped it up into really small pieces – purely a thought experiment, of course. Because this is what We have no idea is all about: big science questions cut into bite-size pieces wrapped in an entertaining tortilla of ridiculous examples and comic-style illustrations.