The five senses have traditionally been viewed as distinct yet complementary  Each sense is thought to have its own range of stimuli that are incapable of stimulating the other senses  However, recent research has discovered that some people taste a banana and claim that they are tasting blue, or see a color and say that it has a specific smell
This shows that such people, called synesthesiacs, have senses that do not respect the usual boundaries between the five recognized senses
Recent evidence strongly suggests that there are other senses besides sight, touch, smell, hearing, and taste.