X-Message-Number: 20824
From: 
Date: Fri, 10 Jan 2003 14:54:16 EST
Subject: nano/macro

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Sometimes people rush into print half cocked or a quarter cocked--even smart 
people. 

Breezy statements have been made to the effect that nano devices can't make 
macro repairs--i.e., are not suitable for injuries or displacements that 
cover much more than nano regions. That is short-sighted and ignores obvious 
facts.

The primary evidence is all around us every day. All organisms grow and 
repair themselves by nano means, a tiny bit at a time--but that doesn't 
prevent macro generation and regeneration. In some animals, whole missing 
limbs can be regenerated. In mammals recently, neurons have been regenerated 
or regrown to fill in gaps.  And of course the original baby or embryonic 
animal or plant is always grown by nano means into a macro product. And it 
doesn't matter much that an impressive number of atoms are involved; we can 
and do deal with these enormous numbers. 

As for Merkle's work on nano repair of cryonics patients, I don't think he or 
anyone else claims exhaustive analysis of every angle of the prospective job, 
but he has certainly done important work in calculating many of the 
requirements and showing potential feasibility in areas that had previously 
been hazy.

Robert Ettinger
Cryonics Institute
Immortalist Society
www.cryonics.org

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