I have no idea about nanotechnology.But I guess it is something that can help science and medicine in the future.

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nano technolgy i thing it's best modern discovery because it has best"" character""  like conectivty 

I believe nanotech are future of the industry. My teacher asked that "What's your opinion about future of industry ?" at the final exam in University. My reply was that " I belive to nanotech will continue to improve. A lot of machines won't be bigger than today's machines, they'll be smaller. A car'll be produced in the apartment !". I passed the exam.

And this time, I think humans will be integrated with machines in 20 years.

Nanoparticules are so tiny they can easily pass through the barrier of cell membranes  and penetrate any cell and even the nucleus. What are the consequences? Nobody knows yet!