Have you ever tasted a word, or seen colors while listening to music? If you have, you may be among the 1% to 4% of people who have a fascinating trait known as synesthesia.

Carol Steen was only seven when she discovered she was different, upon telling a classmate the letter A was the prettiest pink she'd ever seen. "She looked at me like I was crazy," she recalls. Steen ...

Richard Cytowic, a pioneering researcher who returned synesthesia to mainstream science, traces the historical evolution of our understanding of the phenomenon. By Richard E. Cytowic / MIT Press ...