a few weeks ago a friend of mine told me about synaesthesia, a rare condition
in which a stimulus received in one sensory modality gives rise to an experience in another. althought it sounds like LSD or fiction, there seems to be a good deal of evidence suggesting that some people can actually do things such as seeing sound or smelling light.
it was just today that i discovered that i am possibly one of these people. i have a very strong tendancy to sneeze when i'm going from an indoor to an outdoor environment. because i spend a good portion of my day in front of a computer, i've joked that i'm "allergic to outside". but after reading that about 25% of people sneeze when exposed to sunlight, i suspect that sunlight is actually the cause of my own sneezing. this also makes me wonder if there might be a relationship between sun sneezing and anosmia.
neither synaesthesia nor sun sneezing have been researched much at all, unfortunately. this kind of phenomenon is so contradictory to how we normally think of the physical world that i would think it has great potential to drastically improve our understanding of a wide variety of scientific issues.