Could there be a civilization on a mote of dust? How much of your fate have you made? Using pleasingly paradoxical vignettes, known as Koans, that follow the ancient Zen tradition and have a flair for explaining complex science, physicist Anthony Aguirre tackles cosmic questions from the meaning of quantum theory and the nature of time to the origin of multiple universes. Cosmological Koans invites the reader to explore the strange hinterland between the structure of the physical world and our personal experience of it through ideas spanning the age, breadth, and depth of the Universe.