Some rare individuals cannot feel pain. Learn about the condition that causes this deficit here or here.

Whiskers are amazingly useful structures for allowing an animal to explore its environment through the sense of touch. Learn something about what our species misses by not having whiskers, here or here.

Want to know more about the phantom limb phenomenon? Here's a site with case studies of phantom limb, as well as theories and treatment.

Instructions for creating your own no fuss, no muss phantom limb.

The force needed to move an object with your hand depends on the geometry of the surface over which the object is being moved. Experience the relation between force and surface layout, by trying these demonstrations.