As the "Scientific American_ article in the first Web site (1) asks: "When you eat chicken, does it feel pointy or round? Is a week shaped like a tipped-over D with the days arranged counterclockwise? Does the [musical] note B taste like horseradish? Do you get confused about appointments because Tuesday and Thursday have the same color?" For most people, the answer would be a resounding 'no,' but...

In this two-part radio series from BBC Radio 4, the condition of synaesthesia is explored through interviews with scientists and those who have been diagnosed with the condition. Synaesthesia is a condition in which the five senses intermingle, so that stimulation in one sense may give rise to a stimulation in another sense. For one example, certain letters of the alphabet may be associated with...

Synesthesia (or synaesthesia) is loosely defined as "senses coming together." At its simplest level, synesthesia means that when a certain sense or part of a sense is activated, another unrelated sense or part of a sense is activated concurrently. For example, when someone hears a sound, he or she immediately sees a color or shape in his or her "mind's eye." The Synesthesia Project's website...