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.
posted by Artw on Feb 7, 2010 - 31 comments

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.
posted by amyms on Dec 5, 2007 - 2 comments

Dr Hugo's Museum of the Mind - Synaesthesia
posted by Gyan on Jan 20, 2005 - 22 comments

Polarization.com - polarized light in nature & technology. [via MoFi]
posted by Gyan on Dec 8, 2004 - 3 comments

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!
posted by daver on Mar 28, 2001 - 8 comments