Ideas By Richard E. Cytowic December 23, 2024 7:00 AM EST Cytowic is the author of YOUR STONE AGE BRAIN IN THE SCREEN AGE . He is a pioneering researcher in synesthesia, Professor of Neurology at George Washington University, and the author of Synesthesia , The Man Who Tasted Shapes , The Neurological Side of Neuropsychology, and, with David M. Eagleman, the Montaigne Medal–winner Wednesday Is Indigo Blue: Discovering the Brain of Synesthesia , all published by the MIT Press   I n today’s