Pupil size in people with synesthesia changed depending on how bright or dark the perceived colors were.

Daniel Tammet has memorized Pi to the 22,514th digit. He speaks ten different languages, including one of his own invention, and he can multiply enormous sums in his head within a matter of seconds.

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 ...

Vladimir Nabokov first noticed, at age 7, his special gift of synesthesia when playing with colorful alphabet blocks that "were all the wrong color." Source: Contributor: Neil Overy/Alamy Stock Photo.

Synesthesia. It’s when someone sees colors when hearing music, the linking of sensory information with something unrelated. It’s also experienced sometimes as seeing colors in other visuals, such as ...

A new study found that synesthesia is several times more prevalent in musicians than in non-musicians. For example, synesthesia linking sound and color was present in between 0.3% and 1.3% of ...

What do Billie Eilish, Kanye West, and Lorde have in common, besides being famous musicians? They all share the same neurological condition, synesthesia, which may play a part in their artistic ...