Nanotechnology researchers are beginning to build tiny machines that can build other machines. You can learn about these tiny, intelligent machines and see some dramatic examples at the Sandia National Intelligent Micromachine Initiative, www.mdl.sandia.gov/scripts/index.asp. The Foresight Institute at www.foresight.org/homepage.html has a general introduction to nanotechnology, technical information, a FAQ, and more. Nanotechnology Magazine's Web site at nanozine.com, has a NanoMachine gallery, articles on the field's founders, and information about getting a degree in nanotechnology, among other topics.