At 14:16 95-01-20, POLLOCKP_at_b8352ple@smtpgw1.plk.af.mil wrote:
>Incidentally ... I am still puzzled as to how biological systems cope
>with the presence of dirt. You'd tend to think that all those capillaries,
>micro-tubules and nanotubules would get clogged up sooner or later. I'd
>be interested in comments on this subject.
The quick answer here of course is that biological systems are systems of molecular machinery, able to exert much more control over what passes the boundaries of a closed system. This is in contrast to microtechnology, which is pretty crude. :-) This issue precisely goes to the core of the difference between microtech (moving top->down) and nanotech (using a bottom->up methodology). It will likely be very difficult to reach full molecular manufacturing by making microtech just smaller. To me personally, it is not even clear to what degree microtech will be able to assist the development of nanotech.
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