93 HUMAN BODY VERSION 2.0 Raymond Kurzweil, Ph.D. In the coming decades, a radical upgrading of our body’s physi- cal and mental systems, already underway, will use nanobots to augment and ultimately replace our organs. We already know how to prevent most degenerative disease through nutrition and supplementation; this will be a bridge to the emerging biotechnology revolution, which in turn will be a bridge to the nanotechnology revolution. By 2030, reverse engineering of the human brain will have been completed and nonbiologi- cal intelligence will merge with our biological brains. ITS ALL ABOUT NANOBOTS In a famous scene from the movie, The Graduate, Benjamin’s mentor gives him career advice in a single word: “plastics”. Today, that word might be “software”, or “biotechnology”, but  in  another  couple  of  decades,  the  word  is  likely  to  be “nanobots”. Nanobots – blood-cell-sized robots – will pro- vide  the  means  to  radically  redesign  our  digestive  systems, and, incidentally, just about everything else. In an intermediate phase, nanobots in the digestive tract and bloodstream will intelligently extract the precise nutrients we require, call for needed additional nutrients and supplements