Hearing and tasting colours: the multisensory mystery of synaesthesia

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For around 4% of the population, the concept of colour is much more than a stimulation of photoreceptor cells: those who experience synaesthesia are able to hear colours, or associate colours with letters, numbers and even music. The word synaesthesia comes from the Greek ‘syn’ (meaning union) and ‘aesthesis’ (meaning sensation). Therefore, this rare condition […]