Nanotechnology is the development and application of microscopic particles measured in nanometers.

Nanoparticles are very small - they're thousands of times smaller than the diameter of a human hair.

Nanotechnology is a relatively new field that has had scientists and futurists buzzing for years about the possibilities for everything from stain-proof fabrics to tiny semi-intelligent, self-replicating robots.

Recent nanotechnology research is making tremendous progress in the medical field. Applications in this arena could be inexpensive and rapid diagnostics, new methods of drug delivery, and faster development of new drugs. Some longer term and even more powerful nanotechnology solutions could repair DNA and cellular damage and customize drug therapy, some scientists say.

Of concern are studies that raise concerns about the effects of nanoparticles on living creatures, calling for greater caution and federal regulation.