Nanotechnology is expected to revolutionize research into all areas of our lives from within the heart of the living cell to the depth of space itself. It will enable us to construct machines a thousand times smaller than a microchip or the same size as an enzyme, which can be programmed to repair damage or destroy diseases within individual human cells. It is feasible that complex scientific equipment could be built out of nothing more than earth and air. Written by the world's leading expert in the field, this work looks at this remarkable technology and its exciting possibilities.