In her latest book, Katja Guenther traces the history of the mirror self-recognition test. She explores its use and conclusions in various fields including biology, psychology, psychiatry, animal studies, cognitive science, and neuroscience — and uncovers the ways mirrors lead to both identification and misidentification. The Mirror and the Mind (Princeton University Press) ultimately analyzes experiments in self-awareness as well as the advancements of the human sciences across more than a century.