When Walt Disney's characters introduced their song, It's A Small World After All, none of us, by any stretch of our imagination, conceived how small the world might become someday. I thought it couldn't get any smaller than Rob Fly (January 2000 issue of National Driller). Now the Millennium is bringing the world mechanical objects that will be invisible to the human eye via a relatively new science under development called "Nanotechnology."
The word nano is from the Greek language, which means one-billionth. A nanometer is one-billionth of a meter and is three times the size of an atom.