To explain Nanotechnology we have to start at the size we are talking about.We all know by now that Nano is a Greek word and means dwarf. It does not mean we are dealing with dwarfs but it became a common word for everything which is smaller than 1 Micron or 1 millions of a millimeter. 1 Micron is 1000 Nanometer.A human hair is about 50,000 - 100,000 nanometers across. 1 Nanometer is about 10 - 15 atoms next to each other. If a nanometer were somehow magnified to appear as long as the nose on your face, then a red blood cell would appear the size of the Empire State Building, a human hair would be about 20 kilometers wide, one of your fingers would span the continental United States, and a normal person would be about as tall as six or seven planet Earths piled atop one another.