We know that nanotechnology offers real possibilities. It already appears in commercial products such as computers, sunscreens, high-performance sporting equipment, and stain-resistant fabrics. The evolution from vacuum tubes to transistors and high-density integrated circuits has transformed the modern world. Nature itself has shown the way to nanoscale engineering, with molecule-sized assembly lines such as ribosomes and DNA polymerase. Clearly, this “small science” has huge possibilities! The Field Editor discusses the exciting world of nanotechnology in this month’s Editor’s Corner column.