A tour de force of creative scientific answers. It’s perhaps less enjoyable than the original What If? Serious Scientific Answers to Absurd Hypothetical Questions – but only because it is a sequel, and so lacks the novelty of the first. It’s still a rush, ranging from cosmology down to particle physics, with enough black holes to satisfy anyone. And I also learned about the Glass beach of Vladivostok, which is a place I’d never imagined existed and made the book worthwhile all on its own, just as Randall said it would.

5/5. Finished Monday 14 November, 2022.

(Originally published on Goodreads.)