At least three percent of the population is thought to have some form of synesthesia, the phenomenon of blended senses, where a stimulus like letters or numbers can trigger an unrelated sensation, like color or sound. From our partner, the World Science Festival, we have an excerpt of a program presented in association with The Flame Challenge, an annual contest for teachers and scientists held by the Alan Alda Center for Communicating Science at Stony Brook University. In this next piece, neuroscientist David Eagleman explains some of the amazing forms synesthesia can take.
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