Nanotechnology allows us to change the molecular structure of any object. In theory, we could turn trash into a desirable sandwich. We could alter the molecular structure of a rock and transform it into a handheld phone. Nanotechnology has the potential to completely transform the world. It will and has played a major role in medicine. With each new discovery, nanotechnology is extending to the life expectancy of humans. 

    Developments such as the diagnostic sensors, biomarkers, and tissue engineering will revolutionize the medical field in the very

       "The whole nature of the human psyche is based on producing things, doing something, making a contribution. What happens when you don't have to do that anymore? You would have the ultimate utopia where every so desire would be satisfied by molecular assembler. A molecular assembler will take ordinary raw materials breaks them up at the atomic level and joins the joints in specific ways to create specific substances."  (Michio Kaku)