CSA Astronaut Chris Hadfield discusses how senses change aboard the International Space Station: Sound, Sight, Taste, Smell, and Touch. [previously]
Sea urchins do not have eyes, yet appear to be able to see where they are going. One posible answer: they may use the entire surface of their bodies as a compound eye.
Seeing, Hearing and Smelling the World. From the main page, click on the various articles to access a larger left-side menu, with articles including Illusions Reveal The Brain's Assumptions, A Hot Spot in the Brain's Motion Pathway, The Value of Having Two Ears, The Memory of Smells and much more.
Cool eyeball science Quick summary of interesting research on the output of the eyeball. 3 really cool things: 1, we know much more about the output of the eyeball now than a few years ago; 2, they've got a neural network doing visual processing like the eye; 3, most of what you see your brain makes up!