Incarnadine, I read the science news on bbc and/or cnn and the nasa website nearly everyday, so you are not alone in your relative geekiness. :) Speaking of science and eyes, someone's worked out a way to put a chip on the retina and stimulate enough rods and cones to give some people the ability to see light and dark. Soon we will all be cyborgs. Of course, after the physical process of getting the image into the brain, then the mind must interpret it. Do certain shades of green remind you of a summer lake or your grandmother's living room? Does red make you hungry or blue make you sad? How do you choose the right color to make the right mood. What do the armchair psychologists here say?