The Web site from BioMedia (1) is a fascinating look (no pun intended) at the eyes of other animals. Various images of eyeballs link to essays that explain such questions as how animals can see underwater and how many times the eye independently evolved in the animal kingdom. The next site (2) is based on a PBS Nova documentary about nocturnal animals. Visitors can click on an image of an eye to...

In this two-part radio series from BBC Radio 4, the condition of synaesthesia is explored through interviews with scientists and those who have been diagnosed with the condition. Synaesthesia is a condition in which the five senses intermingle, so that stimulation in one sense may give rise to a stimulation in another sense. For one example, certain letters of the alphabet may be associated with...

This BBC Web site is absolutely packed with interactive features and cool facts about human senses. Created as the online companion to a recently-aired BBC science documentary series, this Web site offers a fun way to explore the five senses and the human brain. A set of quirky tests help visitors determine whether they are supertasters, learn about their personalities via the foods they crave, or...

As the "Scientific American_ article in the first Web site (1) asks: "When you eat chicken, does it feel pointy or round? Is a week shaped like a tipped-over D with the days arranged counterclockwise? Does the [musical] note B taste like horseradish? Do you get confused about appointments because Tuesday and Thursday have the same color?" For most people, the answer would be a resounding 'no,' but...