Did you know that scientists can tell how old a whale is from its earwax? Or that sharks existed before trees? Welcome to FACTopia, a world of perfectly amazing facts verified by Encyclopaedia Britannica! Every fact in the book is connected to the next in an ingenious trail of information; hop from topic to topic in unexpected and hilarious ways, and discover extraordinary facts about fungus, dreams, dogs, tyrannosaurs, planets, diamonds, bumblebees, robots, jellyfish, Egyptian mummies, and more!

But there's not just one trail through these pages: sometimes your path branches and you can choose to jump to a totally different (but still connected) part of the book. Discover where your curiosity will take you!