X-Message-Number: 25845
From: "John de Rivaz" <>
References: <>
Subject: National Geographic on cryonics
Date: Mon, 21 Mar 2005 16:15:31 -0000

with regards to

> there is no
scientific evidence that a cryopreserved human will ever be revived.


it is also true to say that no one now living, whether at the top of the 
scientific, medical, legal, law enforcement or political professions can say 
with absolute certainty (or even enough certainty to make correct life or death 
decisions) that cryopreservation will not result in reanimation to good youthful
health.

-- 

Sincerely, John de Rivaz:  http://John.deRivaz.com for websites including 
Cryonics Europe, Longevity Report, The Venturists, Porthtowan, Alec Harley 
Reeves - inventor, Arthur Bowker - potter, de Rivaz genealogy,  Nomad .. and 
more
  ----- Original Message ----- 
  From: Giu1i0 Pri5c0 

  To:  ;  ; 
   ; ExI chat list ; 
   
  Sent: 21 March 2005 10:02
  Subject: [Cryonics Europe] National Geographic on cryonics


  The National Geographic magazine has a good article on cryonics.
  The prospect of cheating death raises a host of philosophical, moral,
  and religious questions. But let's consider only the scientific
  aspects.
  Even proponents of cryonics, the practice of storing entire organisms
  (or at least their brains) for future revival, admit there is no
  scientific evidence that a cryopreserved human will ever be revived.
  No one even knows what technology would have to be developed to
  reverse the preservation.
  Many questions surround the cryopreservation process itself. In
  cryopreservation, cells and tissues are stored at frigid, cryogenic
  temperatures - where metabolism and decay are almost stopped - for
  future revival at normal temperatures.
  But scientists have long known that the freezing process creates ice
  crystals, which destroy cells and cellular structures.
  A few years ago, cryobiologists discovered a new preservation process,
  called vitrification, which virtually eliminates ice-crystal
  formation. Rather than freezing the tissue, vitrification suspends it
  in a highly viscous glassy state. In this mode, molecules remain in a
  disordered state, as in a fluid, rather than forming a crystalline
  structure.
  http://news.nationalgeographic.com/news/2005/03/0318_050318_cryonics.html

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