I really enjoyed this book. In a world where most geographical frontiers have already been explored it's inspiring to read about the wild west of science where our knowledge is small and great discoveries are still to be made.The author did a good job of interweaving the 13 things so the book felt like a single work and not 13 distinct essays. There are interesting humans elements to the book. It's fascinating how the careers of so many scientists were affected by their 'discoveries.' The final chapter on homeopathy, the one I almost skipped because the topic seemed like an open-and-shut case, surprisingly turned out to be the most interesting. I also really enjoyed the discussion on dark matter and the way that single topic was interwoven throughout the book.