"Imagine, for example, a substance with 100 times the strength of steel, yet only 1/6 the weight; materials that instantly heal themselves when punctured; surfaces that can "feel" the forces pressing on them; wires and electronics as tiny as molecules; structural materials that also generate and store electricity; and liquids that can instantly switch to solid and back again at will. All of these materials exist today ... and more are on the way." -- Nasa website published this on 16th Sep 2002 (http://science.nasa.gov/headlines/y2002/16sep_rightstuff.htm)

Wondering how little we know. :) Yes, thats fascinating, isnt it?