Cryonics: Difference between revisions

From Wikipedia, the free encyclopedia
Content deleted Content added
m Reverted edits by 98.225.209.72 (talk) to last revision by 98.215.168.255 (HG)
Replaced content with '[[File:Exampl[[File:File:Example.jpg[[File:File:Example.jpg[[File:File:Example.jpg[[File:File:Example.jpg[[File:File:Example.jpg[[File:[[...'
Tag: possible vandalism
Line 1: Line 1:
[[File:Exampl[[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]][[File:[[File:Example.jpg]]--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)--[[Special:Contributions/82.13.145.35|82.13.145.35]] ([[User talk:82.13.145.35|talk]]) 10:36, 9 October 2011 (UTC)]]]]]]]]]]]]]]]]]]]]]]]]]]e.jpg]]
{{For|the study of the production of very low temperatures|Cryogenics}}

[[File:Cryo surgery.jpg|thumb|270px|Technicians prepare a patient for cryopreservation.]]

'''Cryonics''' (from Greek ''kryos-'' meaning ''icy cold'') is the low-temperature preservation of humans and animals who can no longer be sustained by contemporary medicine, with the hope that healing and [[wikt:resuscitate|resuscitation]] may be possible in the future. [[Cryopreservation]] of people or large animals is not reversible with current technology. The stated rationale for cryonics is that people who are considered dead by current legal or medical definitions may not necessarily be dead according to the more stringent [[Information-theoretic death|information-theoretic definition of death]].<ref name="Whetstine L et al. 2005 538–542">{{cite journal |author=Whetstine L, Streat S, Darwin M, Crippen D |title=Pro/con ethics debate: when is dead really dead? |journal=Critical Care |volume=9 |issue=6 |pages=538–42 |year=2005 |pmid=16356234 |pmc=1414041 |doi=10.1186/cc3894}}</ref> It is proposed that cryopreserved people might someday be recovered by using highly advanced future technology.<ref name="Merkle RC 1992 6–16">{{cite journal |author=Merkle RC |title=The technical feasibility of cryonics |journal=Medical Hypotheses |volume=39 |issue=1 |pages=6–16 |year=1992 |month=September |pmid=1435395 |doi=10.1016/0306-9877(92)90133-W}}</ref>

The future repair technologies assumed by cryonics are still hypothetical and not widely known or recognized. Responding to skepticism from scientists such as [[Steve Jones (biologist)|Steve Jones]],<ref>{{Citation
| date = 19 September
| year = 2002
| title =Lucky winner 'could cheat death'
| publisher = BBC News
| url =http://news.bbc.co.uk/1/hi/health/2268181.stm
| accessdate = 2011-01-24
}}</ref> an open letter supporting cryonics was written and signed by currently 62 scientists.<ref>{{cite web
| title = Scientists Open Letter on Cryonics
| url = http://www.imminst.org/cryonics_letter/
| accessdate = 2010-03-08}}</ref> As of 2010, only around 200 people have undergone the procedure since it
was first proposed in 1962.<ref>{{cite web | title = Complete List Of Alcor Cryopreservations | publisher = [[Alcor Life Extension Foundation]] | url = http://www.alcor.org/cases.html | accessdate = 2010-10-07 }}</ref><ref>{{cite web | title = Cryonics Institute (CI) Patient Details | publisher = [[Cryonics Institute]] | url = http://www.cryonics.org/patients.html | accessdate = 2010-10-07 }}</ref><ref>{{cite web | title = Comparing Procedures and Policies | work = Sizes of the Organizations | publisher = [[Cryonics Institute]] | url = http://www.cryonics.org/comparisons.html#Size | accessdate = 2010-10-07 }}</ref> In the United States, cryonics can only be legally performed on humans after they have been pronounced [[Legal death|legally dead]] as otherwise it would count as murder or [[assisted suicide]].{{citation needed|date=February 2011}}

Cryonics procedures ideally begin within minutes of cardiac arrest, and use [[cryoprotectants]] to prevent ice formation during cryopreservation. However, the idea of cryonics also includes preservation of people after longer post-mortem delays because of the possibility that brain structures encoding memory and personality may still persist or be inferable. Whether sufficient brain information still exists for cryonics to work under some preservation conditions may be intrinsically unprovable by present knowledge.<ref>{{cite journal
| last = Donaldson
| first = Thomas
| title = Neural Archeology
| journal = Cryonics
| pages = 24–33
| month= February | year= 1987
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/Library/html/NeuralArcheology.html
| accessdate = 2010-03-08}}</ref> Therefore, most proponents of cryonics see it as an intervention with prospects for success that vary widely depending on circumstances.

==Premises of cryonics==
A central [[premise]] of cryonics is that [[long-term memory]], personality, and [[Personal identity (philosophy)|identity]] are stored in durable [[Cell (biology)|cell]] structures and patterns within the [[Human brain|brain]] that do not require continuous brain activity to survive. This premise is generally accepted in medicine; it is known that under certain conditions the brain can stop functioning and still later recover with retention of long-term memory.<ref>{{cite book
| title = Textbook of Medical Physiology
| last = Guyton
| first = Arthur C.
| edition = 7th
| publisher = W. B. Saunders Company
| year = 1986
| isbn = 0-7216-1260-1
| page = 658
| chapter = The Cerebral Cortex and Intellectual Functions of the Brain
| quote = We know that secondary memory does not depend on continued activity of the nervous system, because the brain can be totally inactivated by cooling, by general anesthesia, by hypoxia, by ischemia, or by any method, and yet secondary memories that have been previously stored are still retained when the brain becomes active once again. Therefore, secondary memory must result from some actual alterations of the synapses, either physical or chemical.}}</ref><ref>{{cite book
| title = The Scientific Conquest of Death
| last = Wowk B
| publisher = Libros En Red
| year = 2004
| isbn = 987-561-135-2
| pages = 135–150
| chapter = Medical Time Travel
| url = http://www.alcor.org/Library/html/medicaltimetravel.htm
| accessdate = 2010-03-12}}</ref> Additional scientific premises of cryonics<ref>{{cite web
| title = What is Cryonics?
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/AboutCryonics/index.html
| accessdate = 2010-03-12}}</ref> are that (1) brain structures encoding personality and long-term memory persist for some time after clinical death, (2) these structures are preserved by cryopreservation, and (3) future technologies that could restore encoded memories to functional expression in a healed person are theoretically possible.

Cryonics is controversial because the technologies of premise (3) are so advanced that premises (1) and (2) are considered irrelevant by most scientists. Whether biological traces of memory or personhood might persist after clinical death is obviously a question of interest. Similarly, outside of cryonics there is no interest in the question of whether memory encoding might survive cryopreservation because the question is regarded as meaningless until cryopreservation can be reversed. At present only cells, tissues, and some small organs can be reversibly cryopreserved.<ref>{{cite journal |author=Fahy GM, Wowk B, Wu J |title=Cryopreservation of complex systems: the missing link in the regenerative medicine supply chain |journal=Rejuvenation Research |volume=9 |issue=2 |pages=279–91 |year=2006 |pmid=16706656 |doi=10.1089/rej.2006.9.279}}</ref><ref>{{cite journal |doi=10.4161/org.5.3.9974 |author=Fahy GM, Wowk B, Pagotan R, ''et al.'' |title=Physical and biological aspects of renal vitrification |journal=Organogenesis |volume=5 |issue=3 |pages=167–75 |year=2009 |month=July |pmid=20046680 |pmc=2781097}}</ref> Medical science is primarily concerned with what is demonstrably achievable, not what is theoretically possible. There are therefore no established scientific specialties or [[academic journal|journals]] directly concerned with the scientific questions posed by cryonics.

Cryonics advocates claim that it is possible to preserve the fine cell structures of the brain in which memory and identity reside with present technology.<ref>{{cite book| url = http://www.alcor.org/Library/html/braincryopreservation1.html| accessdate = 2006-03-17| title = Effect of Human Cryopreservation Protocol on the Ultrastructure of the Canine Brain| last = Platt| first = Charles| publisher = Alcor Life Extension Foundation| year = 1995| work = CryoCare Report| edition = 4}}</ref> They say that demonstrably reversible preservation is not necessary to achieve the present-day goal of cryonics, which is preservation of brain information that encodes memory and personal identity. They believe that current cryonics procedures can preserve the anatomical basis of mind,<ref>{{cite journal |author=Best BP |title=Scientific justification of cryonics practice |journal=Rejuvenation Research |volume=11 |issue=2 |pages=493–503 |year=2008 |month=April |pmid=18321197 |doi=10.1089/rej.2008.0661}}</ref> and that this should be sufficient to prevent [[information-theoretic death]] until future repairs might be possible.

A moral premise of cryonics is that cryopreserving people when there is no other hope is the right thing to do, sometimes even under poor conditions that make the scientific premises of cryonics highly uncertain. Some cryonicists believe as a matter of principle that anyone who would ordinarily be regarded as dead should instead be made a "permanent patient" subject to whatever future advances might bring.<ref>{{cite journal
| last = Donaldson
| first = Thomas
| title = Neural Archeology
| journal = Cryonics
| pages = 24–33
| month= February | year= 1987
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/Library/html/NeuralArcheology.html
| accessdate = 2010-03-13
| quote = The really key idea in cryonics is the idea of freezing (or otherwise preserving) people when we don't know if we can ever revive them.... The cryonics proposal is to treat everyone with these conditions as a permanent patient, until means are found to bring them back.}}</ref>

==Obstacles to success==
=== Preservation injury===
Long-term cryopreservation can be achieved by cooling to near 77.15 [[Kelvin]], the [[boiling point]] of [[liquid nitrogen]]. It is a common mistaken belief that cells will lyse (burst) due to the formation of ice crystals within the cell, since this only occurs if the freezing rate exceeds the osmotic loss of water to the extracellular space.<ref>{{cite journal |author=Mazur P |title=Freezing of living cells: mechanisms and implications |journal=The American Journal of Physiology |volume=247 |issue=3 Pt 1 |pages=C125–42 |year=1984 |month=September |pmid=6383068 |url=http://ajpcell.physiology.org/cgi/pmidlookup?view=reprint&pmid=6383068}}</ref> However, damage from freezing can still be serious; ice may still form between cells, causing mechanical and chemical damage. Cryonics organizations use [[cryoprotectant]]s to reduce this damage. Cryoprotectant solutions are circulated through blood vessels to remove and replace water inside cells with chemicals that prevent freezing. This can reduce damage greatly,<ref>{{cite book| url = http://www.alcor.org/Library/html/braincryopreservation1.html| accessdate = 2006-03-17| title = New Brain Study Shows Reduced Tissue Damage| last = Platt| first = Charles| publisher = CryoCare Foundation| year = 1995| work = CryoCare Report| edition = 4}}</ref> but freezing of whole people still causes injuries that are not reversible with present technology.{{Citation needed|date=July 2008}}

When used at high concentrations, cryoprotectants stop ice formation completely. Cooling and solidification without freezing is called [[Cryopreservation#Vitrification|vitrification]].<ref>{{cite journal |author=Fahy GM, MacFarlane DR, Angell CA, Meryman HT |title=Vitrification as an approach to cryopreservation |journal=Cryobiology |volume=21 |issue=4 |pages=407–26 |year=1984 |month=August |pmid=6467964 |doi=10.1016/0011-2240(84)90079-8}}</ref> The first cryoprotectant solutions able to vitrify at very slow cooling rates while still being compatible with tissue survival were developed in the late 1990s by [[Cryobiology|cryobiologists]] [[Greg Fahy|Gregory Fahy]] and [[Brian Wowk]] for the purpose of banking transplantable organs.<ref>{{cite journal |author=Fahy GM, Wowk B, Wu J, ''et al.'' |title=Cryopreservation of organs by vitrification: perspectives and recent advances |journal=Cryobiology |volume=48 |issue=2 |pages=157–78 |year=2004 |month=April |pmid=15094092 |doi=10.1016/j.cryobiol.2004.02.002}}</ref><ref>{{cite journal |doi=10.1016/j.cryobiol.2005.03.002 |title=Corrigendum to “Cryopreservation of organs by vitrification: perspectives and recent advances” [Cryobiology 48 (2004) 157–178] |year=2005 |last1=Fahy |first1=G |last2=Wowk |first2=B |last3=Wu |first3=J |last4=Phan |first4=J |last5=Rasch |first5=C |last6=Chang |first6=A |last7=Zendejas |first7=E |journal=Cryobiology |volume=50 |pages=344}}</ref> These solutions were adopted for use in cryonics by the [[Alcor Life Extension Foundation]], for which they are believed to permit [[Cryopreservation#Vitrification|vitrification]] of some parts of the human body, especially the brain.<ref>{{cite web | title = New Cryopreservation Technology | publisher = Alcor Life Extension Foundation | month= October | year= 2005 | url = http://www.alcor.org/Library/html/newtechnology.html | accessdate = 2007-04-29}}</ref> This has allowed animal brains to be vitrified, warmed back up, and examined for ice damage using light and [[Electron microscope|electron microscopy]]. No ice crystal damage was found.<ref>{{cite journal |author=Lemler J, Harris SB, Platt C, Huffman TM |title=The arrest of biological time as a bridge to engineered negligible senescence |journal=Annals of the New York Academy of Sciences |volume=1019 |issue= |pages=559–63 |year=2004 |month=June |pmid=15247086 |doi=10.1196/annals.1297.104}}</ref><ref>{{cite book| url = http://www.alcor.org/Library/html/cambridge.html| title = Alcor Presentation at Cambridge University| last = Lemler J, Harris SB, Platt C, Huffman TM| publisher = Alcor Life Extension Foundation| year = 2004| accessdate = 2006-03-31}}</ref> The [[Cryonics Institute]] also uses a vitrification solution developed by their staff cryobiologist, Dr. Yuri Pichugin, applying it principally to the brain.<ref>{{cite web| title = CI-VM-1 Cryoprotectant and CI-Carrier Solution Used for Vitrification | publisher = Cryonics Institute | year= 2007 | url = http://www.cryonics.org/research/CI-VM-1.html | accessdate = 2007-04-29}}</ref>

Vitrification in cryonics is different than vitrification in mainstream cryobiology because vitrification in cryonics is not reversible with current technology. It is only structural vitrification. When successful it can prevent freezing injury in some body parts, but at the price of toxicity caused by cryoprotectant chemicals. The nature of this toxicity is still poorly understood. Cryonicists assume that toxicity is more subtle and repairable than obvious structural damage that would otherwise be caused by freezing. If, for example, toxicity is due to [[Denaturation (biochemistry)|denatured]] [[protein]]s, those proteins could be repaired or replaced.

=== Ischemic injury ===
[[Ischemia]] means inadequate or absent blood circulation that deprives tissue of oxygen and nutrients. At least several minutes of ischemia is a typical part of cryonics because of the common legal requirement that cryonics procedures do not begin until after blood circulation stops. The heart must stop beating so that [[legal death]] can be declared. When there is advance notice of impending [[clinical death]], it is sometimes possible to deploy a team of technicians to perform a “standby”. The team artificially restores blood circulation and breathing using techniques similar to [[CPR]] as soon as possible after the heart stops.<ref>{{cite web
| last = Wowk B
| title = Cardiopulmonary Support in Cryonics
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/Library/html/CardiopulmonarySupport.html
| accessdate = 2007-04-29}}</ref> The aim is to keep tissues alive after legal death by analogy to conventional medical procedures in which viable organs and tissues are obtained for transplant from legally deceased donors. Legal death does not mean that all the cells of the body have died.<ref>{{cite web
| title = National Human Neuronal Stem Cell Resource Frequently Asked Questions
| publisher = NHNSCR
| url = http://nhnscr.org/home/faqs_q4.htm
| accessdate = 2007-04-29}}</ref>

Often in cryonics the brain is without oxygen for many minutes at warm temperatures, or even hours if the heart stops unexpectedly. This causes ischemic injury to the brain and other tissues that makes resuscitation impossible by present medical technology. Cryonicists justify preservation under such conditions by noting recent advances that allow brain resuscitation after longer periods of ischemia than the traditional 4-to-6-minute limit, and persistence of brain structure and even some brain cell function after long periods of [[clinical death]].<ref name = "Donaldson-1976">{{cite book
| url = http://www.alcor.org/Library/html/DonaldsonBrief.html
| accessdate = 2007-04-29
| title = A Brief Scientific Introduction to Cryonics
| last = Donaldson
| first = Thomas
| publisher = Alcor Life Extension Foundation
| year = 1976}}</ref><ref>{{cite journal
| title = The Cryobiological Case for Cryonics
| journal = Cryonics
| pages = 23–36
| month= March | year= 1988
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/Library/html/caseforcryonics.html
| accessdate = 2007-04-29}}</ref> They argue that definitions of death change as technology advances, and the early stages of what is called “death” today is actually a form of ischemic injury that will be reversible in the future.<ref>{{cite journal
| last = Donaldson
| first = Thomas
| title = Prospects of a Cure for “Death”
| journal = Cryonics
| pages = 26–35
| month= May | year= 1990
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/Library/html/ProspectsOfACureForDeath.html
| accessdate = 2007-04-29}}</ref> They claim that personal survival during long periods of clinical death is determined by [[Information-theoretic death|information-theoretic criteria]].<ref name="Whetstine L et al. 2005 538–542"/><ref name="Merkle RC 1992 6–16"/><ref>{{cite journal |author=Crippen DW, Whetstine LM |title=Ethics review: dark angels—the problem of death in intensive care |journal=Critical Care |volume=11 |issue=1 |pages=202 |year=2007 |pmid=17254317 |pmc=2151911 |doi=10.1186/cc5138}}</ref>

===Revival===
Those who believe that revival may someday be possible generally look toward advanced [[bioengineering]], [[molecular nanotechnology]],<ref>Nanofactory Collaboration http://www.MolecularAssembler.com/Nanofactory</ref> [[nanomedicine]],<ref>Robert A. Freitas Jr., Nanomedicine, Landes Bioscience; Vol I (1999), Vol IIA (2003) [http://www.nanomedicine.com Nanomedicine.com]</ref> or [[mind uploading]] as key technologies. Revival requires repairing damage from lack of oxygen, cryoprotectant toxicity, thermal stress (fracturing), freezing in tissues that do not successfully vitrify, and reversing the effects that caused the patient's death. In many cases extensive [[Regeneration (biology)|tissue regeneration]] will be necessary. Hypothetical revival scenarios generally envision repairs being performed by vast numbers of microscopic organisms or devices.<ref>{{cite book
| url = http://www.alcor.org/Library/html/MolecularRepairOfTheBrain.htm
| accessdate = 2006-04-04
| title = Molecular Repair of the Brain
| last = Merkle
| first = R
| publisher = Alcor Life Extension Foundation
| year = 1994}}</ref><ref>{{cite book
| url = http://www.alcor.org/Library/html/nanotechrepair.html
| accessdate = 2006-04-04
| title = Realistic Scenario for Nanotechnological Repair of the Frozen Human Brain
| publisher = Alcor Life Extension Foundation
| year = 1991}}</ref><ref>{{cite book
| url = http://www.foresight.org/EOC/EOC_Chapter_9.html#section03of06
| accessdate = 2006-04-04
| title = Engines of Creation
| last = Drexler
| first = E
| publisher = Ancor Press/Doubleday
| year = 1986
| isbn = 0385199732}}</ref><ref>{{cite book
| url = http://www.alcor.org/Library/html/resuscitation.htm
| accessdate = 2006-04-04
| title = Resuscitation: A Speculative Scenario for Recovery
| last = Darwin
| first = M
| publisher = Alcor Life Extension Foundation
| year = 1988}}</ref><ref>{{cite journal
| url = http://www.alcor.org/cryonics/cryonics0804.pdf
| accessdate = 2009-11-06
| title = A cryopreservation revival scenario using MNT
| last = Merkle, R and Freitas, R
| journal = Cryonics
| publisher = Alcor Life Extension Foundation
| year = 2008
| volume = 29}}</ref> These devices would restore healthy cell structure and chemistry at the molecular level, ideally before warming. More radically, [[mind transfer]] has also been suggested as a possible revival approach if and when technology is ever developed to scan the memory contents of a preserved brain.

It has sometimes been written that cryonics revival will be a last-in-first-out process. People cryopreserved in the future, with better technology, may require less advanced technology to be revived because they will have been cryopreserved with better technology that caused less damage to tissue. In this view, preservation methods will get progressively better until eventually they are demonstrably reversible, after which medicine will begin to reach back and revive people cryopreserved by more primitive methods. Revival of people cryopreserved by early cryonics technology may require centuries, if it is possible at all.<ref name = "Donaldson-1976"/> The "last in, first out" view of cryonics has been criticized because the quality of cryopreservation depends on many factors other than the era in which cryopreservation takes place.<ref>{{cite web
| last = de Wolf
| first = Aschwin
| title = 5 dangerous idea about cryonics
| publisher = Depressed Metabolism
| date = 2009-01-20
| url = http://www.depressedmetabolism.com/2009/01/20/5-dangerous-ideas-about-cryonics/
| accessdate = 2010-03-07}}</ref>

It has been claimed that if technologies for general molecular analysis and repair are ever developed, then theoretically any damaged body could be “revived”.<ref>{{cite web
| title = How might cryonics fail?
| publisher = Alcor Life Extension Foundation
| url = http://www.alcor.org/FAQs/faq01.html#clinically
| accessdate = 2010-03-07}}</ref>
Survival would then depend on whether preserved brain information was sufficient to permit restoration of all or part of the personal identity of the original person, with [[amnesia]] being the final dividing line between success and failure.

==Neuropreservation==
[[Neuropreservation]] is cryopreservation of the brain, often within the head, with surgical removal and disposal (usually cremation) of the rest of the body. Neuropreservation, sometimes called “neuro,” is one of two distinct preservation options in cryonics, the other being "whole body" preservation.

Neuropreservation is motivated by the [[Human brain|brain]]'s role as the primary repository of memory and personal identity. (For instance, spinal cord injury victims, organ transplant patients, and amputees retain their personal identity.) It is also motivated by the belief that reversing any type of cryonic preservation is so difficult and complex that any future technology capable of it must by its nature be capable of generalized [[regeneration (biology)|tissue regeneration]], including growth of a new body around a repaired brain. Some suggested revival scenarios for whole body patients even involve discarding the original body and regenerating a new body because tissues are so badly damaged by the preservation process. These considerations, along with lower costs, easier transportation in emergencies, and the specific focus on brain preservation quality, have motivated many cryonicists to choose neuropreservation.

The advantages and disadvantages of neuropreservation are often debated among cryonics advocates. Critics of neuropreservation note that the body is a record of much life experience, including learned motor skills ([[muscle memory]]). While few cryonicists doubt that a revived neuro patient would be the same person, there are wider questions about how a regenerated body might feel different from the original.<ref>{{cite book
| url = http://www.alcor.org/Library/html/CaseForWholeBody.html
| last = O'Neal
| first = Michael B.
| year = 1990
| work = Cryonics
| title = The Case for Whole Body Suspension
| publisher = Alcor Life Extension Foundation
| accessdate = 2006-03-16}}</ref> Partly for these reasons (as well as for better public relations), the [[Cryonics Institute]] preserves only whole bodies. Some proponents of neuropreservation agree with these concerns, but still feel that lower costs and better brain preservation justify concentrating preservation efforts on the brain. About two-thirds of the patients stored at Alcor are neuropreservation patients. Although the [[American Cryonics Society]] no longer offers the neuropreservation option, about half of their patients are "neuros".

==Financial issues==
Financing storage of a cryonics patient at a cryonics organization by an on-going payment system was done in the early days of cryonics, but this system proved to be unworkable. Cryonics patients are to be stored for many decades, if not a century or two or longer, and a reliable source of outside funding is highly unlikely. Pay-as-you go funding was part of the reason for the CSC Chatsworth financial failure described in the history section. All modern cryonics organizations require full payment for all future costs associated with storage "in perpetuity" before patient cryostorage will be accepted.

Costs of cryonics vary greatly, ranging from the basic fee of $10,000 for neuro (head or brain only) cryopreservation at the European cryonics company [[KrioRus]], to more than $200,000 for whole body cryopreservation by Alcor with overseas and last-minute fees. Alcor's neuropreservation (just the head) is priced at $80,000. There is an extra $500 annual membership fee during life by Alcor.<ref>{{cite web | title = Membership info: costs | publisher = Alcor Life Extension Foundation | url = http://www.alcor.org/BecomeMember/scheduleA.html }}</ref><ref>''Modern Marvels: Deep Freeze''. '''The History Channel'''.</ref> After payment of an initiation fee, ACS full members pay an annual fee of $300 currently.<ref>{{cite web| title = ACS Suspension Program | url = http://americancryonics.org/jack-frost/jack-frost.htm | accessdate = 2008-04-01}}</ref> To some extent these cost differences reflect differences in how fees are quoted. The [[Cryonics Institute]] fee of $28,000 or $35,000 does not include “standby” (a team waits for death to occur and begins procedures at bedside), transportation costs, or funeral director expenses outside of Michigan, which must be purchased as extras.<ref name="CryoCompare" /> CI Members wanting Standby and Transport from cryonics professionals can contract for additional payment to the Florida-based company Suspended Animation, Inc.<ref name="CryoCompare" />

While cryonics is sometimes suspected of being greatly profitable, the high expenses of doing cryonics are well documented.<ref>{{cite book| url = http://www.alcor.org/Library/html/CostOfCryonics.html| title = The Cost of Cryonics| last = Darwin| first = Mike| publisher = Alcor Life Extension Foundation| work = Cryonics| year = 1990| accessdate = 2006-03-17}}</ref> The expenses are comparable to major [[Organ transplantation|transplant]] surgeries. The two most expensive things are standby expenses (a team of 5+ people needs to be hired for up to several weeks) and the money that must be set aside to generate interest to pay for storage of the patient in liquid nitrogen in perpetuity (especially for whole body patients).

The most common method of paying for cryonics is [[life insurance]], which spreads the cost over many years. Cryonics advocates are quick to point out that such insurance is especially affordable for young people. Cryonics providers claim that even the most expensive cryonics plans are “affordable for the vast majority” of people in the industrialized world who really want it and plan for it in advance. With the advent of low-cost cryonics provided by companies such as KrioRus (so far in Europe only) cryonics becomes feasible even for last-minute cases.

==Philosophical and ethical considerations==
Cryonics is based on a view of dying as a process that can be stopped in the minutes, and perhaps hours, following [[clinical death]]. If death is not an event that happens suddenly when the heart stops, this raises philosophical questions about what exactly death is. In 2005 an ethics debate in the medical journal, Critical Care, noted “…few if any patients pronounced dead by today’s physicians are in fact truly dead by any scientifically rigorous criteria.”<ref>{{cite book
| url = http://ccforum.com/inpress/cc3894/abstract
| publisher = Critical Care Forum
| title = Pro/con ethics debate: When is dead really dead?
| date = 2005-10-31
| last = Whetstine
| first = Leslie
| coauthors = Stephen Streat, Mike Darwin, and David Crippen
| accessdate = 2006-03-17}}</ref> Cryonics proponent [[Thomas K. Donaldson|Thomas Donaldson]] has argued that “death” based on cardiac arrest or resuscitation failure is a purely social construction used to justify terminating care of dying patients.<ref>{{cite book
| url = http://www.alcor.org/Library/html/ProspectsOfACureForDeath.html
| title = Prospects of a Cure for "Death"
| work = Cryonics
| year = 1990
| last = Donaldson
| first = Thomas
| publisher = Alcor Life Extension Foundation
| accessdate = 2006-03-17}}</ref> In this view, [[legal death]] and its aftermath are a form of [[euthanasia]] in which sick people are abandoned. Philosopher [[Max More]] suggested a distinction between death associated with circumstances and intention versus death that is absolutely irreversible.<ref>{{cite book
| url = http://www.alcor.org/Library/html/TerminusOfTheSelf.html
| title = The Terminus of the Self
| work = Cryonics
| year = 1995
| last = More
| first = Max
| accessdate = 2006-03-17
| publisher = Alcor Life Extension Foundation}}</ref> Absolutely irreversible death has also been called [[information-theoretic death]], which implies destruction of the brain to such an extent that the original information content can no longer be recovered. Bioethicist [[James Hughes (sociologist)|James Hughes]] has written that increasing rights will accrue to cryonics patients as prospects for revival become clearer, noting that recovery of legally dead persons has precedent in the discovery of missing persons.<ref>{{cite book
| url = http://www.jetpress.org/volume6/death.htm
| accessdate = 2006-03-17
| title = The Future of Death: Cryonics and the Telos of Liberal Individualism
| last = Hughes
| first = James J.
| work = Journal of Evolution and Technology
| edition = Volume 6
| year = 2001
| publisher = Jet Press}}</ref>

Ethical and [[theological]] opinions of cryonics tend to pivot on the issue of whether cryonics is regarded as [[interment]] or medicine. If cryonics is interment, then religious beliefs about death and [[afterlife]] may come into consideration. Resuscitation may be deemed impossible by those with religious beliefs because the [[Soul (spirit)|soul]] is gone, and according to most religions only God can resurrect the dead. Cryonics advocates complain that theological dismissal of cryonics because it is interment is a [[circular argument]] because calling cryonics "interment" presumes [[A priori and a posteriori (philosophy)|a priori]] that cryonics cannot work.<ref>{{cite web
| url = http://www.alcor.org/Library/html/hesdeadjim.htm
| title = He's Dead, Jim, The Irreversibility of Death as a Circular Argument
| publisher = Alcor Life Extension Foundation
| accessdate = 2006-03-17}}</ref> They believe future technical advances will validate their view that cryonics patients are recoverable, and therefore never really dead.<ref>{{cite journal
| last = Harris SB
| title = Many are cold but few are frozen: a humanist looks at cryonics
| journal = Free Inquiry
| volume = 9
| pages = 19–24
| year = 1989
| publisher = Council for Secular Humanism
| pmid = 11652342
| first1 = SB
| issue = 2}}</ref>
If cryonics is regarded as medicine, with [[legal death]] as a mere enabling mechanism, then cryonics is a long-term coma with uncertain prognosis. It is continuing to care for sick people when others have given up.

Alcor has published a vigorous Christian defense of cryonics,<ref>{{cite web
| url = http://www.alcor.org/Library/html/christianityandcryonics.html
| title = Christianity and Cryonics
| publisher = Alcor Life Extension Foundation
| accessdate = 2006-03-17}}</ref> including excerpts of a sermon by Lutheran Reverend Kay Glaesner. Noted Christian commentator [[John Warwick Montgomery]] has defended cryonics.<ref>{{cite book
| url = http://www.alcor.org/Library/html/cryonicsandorthodoxy.html
| publisher = Christianity Today
| edition = 12, 816
| title = Cryonics and Orthodoxy
| last = Montgomery
| first = John Warwick
| date = 1968-05-10
| accessdate = 2006-03-17}}</ref> In 1969, a Roman Catholic priest [[consecrated]] the cryonics capsule of Ann DeBlasio, one of the first cryonics patients.<ref>{{cite journal | author=[[Curtis Henderson]] | title=Cryonic Suspension of Ann DeBlasio | journal=Cryonics Reports | volume=4 | issue=9–10 | publisher=Cryonics Society of New York, Inc.
| date=Sep–October 1969 | pages=10–15 }}</ref> Many followers of [[Nikolai Fyodorovich Fyodorov]] see cryonics as an important step in the Common Cause project (reference: Fedorov seminar in Moscow, Russia on 25.11.2006).

At the request of the American Cryonics Society, in 1995, Philosopher Charles Tandy, Ph.D.
<ref>
{{cite web
| last =Tandy
| first = Charles
| authorlink =
| coauthors =
| title = Charles Tandy, Ph.D.
| work =
| publisher =
| date =
| url = http://www.ria.edu/cetandy/
| format =
| doi =
| accessdate = 2008-10-10}}
</ref>
authored a paper entitled “Cryonic-Hibernation in Light of the Bioethical Principles of Beauchamp and Childress.” Dr. Tandy considered the four bioethical factors or principles articulated by philosophers Beauchamp and Childress as they apply to cryonics. These four principles are 1) respect for autonomy; 2) nonmaleficence; 3) beneficence; and 4) justice. Tandy concluded that in respect to all four principles “biomedical professionals have a strong (not weak) and actual (not prima facie, but binding) obligation to help insure cryonic-hibernation of the cryonics patient.” <ref>
{{cite journal
| author = Charles Tandy, Ph.D.
| title = Cryonic-hibernation in light of the bioethical principles of Beauchamp and Childress.
| year = 1995
| url =http://www.cryonics.us/TandyArticle/
| format =
| accessdate = 2008-04-01 }}
</ref>

==History==
[[Benjamin Franklin]], in a 1773 letter,<ref>{{cite book
| url = http://www.e-drexler.com/d/06/00/EOC/EOC_Chapter_9.html
| publisher = Nanotechnology, Molecular Manufacturing, and Productive Nanosystems
| title = Letter to Jacques Duborg
| last = Franklin
| first = Benjamin
| year = 1773
| accessdate = 2008-04-18}}</ref> expressed regret that he lived "in a century too little advanced, and too near the infancy of science" that he could not be preserved and revived to fulfil his "very ardent desire to see and observe the state of America a hundred years hence". In 1922 Alexander Yaroslavsky, member of Russian immortalists-biocosmists movement, wrote "Anabiosys Poem". However, the modern era of cryonics began in 1962 when Michigan college physics teacher [[Robert Ettinger]] proposed in a privately published book, ''The Prospect of Immortality'',<ref>{{cite book | first= Robert C.W. | last= Ettinger| year= 1964 | title= The Prospect of Immortality| edition= First | publisher= Doubleday|url = http://www.cryonics.org/book1.html | isbn= 097434723X}}</ref> that freezing people may be a way to reach future medical technology. Even though freezing a person is apparently fatal, Ettinger argued that what appears to be fatal today may be reversible in the future. He applied the same argument to the process of dying itself, saying that the early stages of [[clinical death]] may be reversible in the future. Combining these two ideas, he suggested that freezing recently deceased people may be a way to save lives.

Slightly before Ettinger’s book was complete, Evan Cooper<ref>{{cite web
| url = http://www.cryonet.org/cgi-bin/dsp.cgi?msg=23124
| title = Ev Cooper
| publisher = cryonet.org
| accessdate = 2006-03-17}}</ref> (writing as Nathan Duhring) privately published a book called ''Immortality: Physically, Scientifically, Now'' that independently suggested the same idea. Cooper founded the Life Extension Society (LES) in 1964 to promote freezing people. Ettinger came to be credited as the originator of cryonics, perhaps because his book was republished by Doubleday in 1964 on recommendation of [[Isaac Asimov]] and [[Fred Pohl]], and received more publicity. Ettinger also stayed with the movement longer. Nevertheless, cryonics historian R. Michael Perry has written “Evan Cooper deserves the principal credit for forming an organized cryonics movement.”<ref>{{cite web
| url = http://www.alcor.org/cryonics/cryonics9208.txt
| title = Cryonics
| publisher = alcor.org
| accessdate = 2006-03-17}}</ref>

Cooper’s [[Life Extension Society]] became the seed tree for cryonics societies throughout the country where local cryonics advocates would get together as a result of contact through the LES mailing list. The actual word “cryonics” was invented by Karl Werner, then a student in the studio of William Katavolos at Pratt Institute in Brooklyn, NY, in 1965 in conjunction with the founding of the Cryonics Society of New York (CSNY)<ref name="perry history">{{cite web
| url = http://www.alcor.org/Library/html/suspensionfailures.html
| last = Perry
| first = R. Michael
| work = Cryonics
| year = 1992
| publisher = Alcor Life Extension Foundation
| accessdate = 2009-08-22
| title = Suspension Failures: Lessons from the Early Years}}</ref> by [[Curtis Henderson]] and [[Saul Kent]] that same year. This was followed by the founding of the Cryonics Society of Michigan (CSM) and Cryonics Society of California (CSC) in 1966, and Bay Area Cryonics Society (BACS) in 1969 (renamed the [[American Cryonics Society]], or ACS, in 1985). Neither CSNY nor CSC are currently in operation. CSM eventually became the Immortalist Society, a non-profit affiliate of the [[Cryonics Institute]] (CI), a cryonics service organization founded by Ettinger in 1976. CI now has more current cryonics patients than any other organization.

Although there was at least one earlier aborted case, it is generally accepted that the first person frozen with intent of future resuscitation was Dr. [[James Bedford]], a 73-year-old psychology professor frozen under crude conditions by CSC on January 12, 1967. The case made the cover of a limited print run of ''[[Life Magazine]]'' before the presses were stopped to report the death of three astronauts in the ''[[Apollo 1]]'' fire instead. Bedford is still frozen today at Alcor.<ref name="perry history"/>

Cryonics suffered a major setback in 1979 when it was discovered that nine bodies stored by the head of the CSC, Robert Nelson, in a cemetery in [[Chatsworth, California]], had thawed due to depletion of funds by relatives, after being maintained for a year and a half at the personal expense of Nelson.<ref name="perry history"/><ref>[http://www.thislife.org/Radio_Episode.aspx?episode=354 "Mistakes Were Made"], ''[[This American Life]]'', 18 April 2008.</ref> Some of the bodies had apparently thawed years earlier without notification. Nelson was sued, and negative publicity slowed cryonics growth for years afterward. Of 17 documented cryonics cases between 1967 and 1973, only James Bedford remains [[cryopreservation|cryopreserved]] today. Strict financial controls and requirements adopted in response to the Chatsworth scandal have resulted in the successful maintenance of almost all cryonics cases since that era.

The largest cryonics organization today, in terms of membership, was established as a nonprofit organization by [[Fred and Linda Chamberlain]] in 1972 as the Alcor Society for Solid State Hypothermia ([[Alcor Life Extension Foundation|ALCOR]]).<ref name="irs letter">{{cite web
| url = http://www.alcor.org/Library/pdfs/AlcorIRSletter.pdf
| last =
| first =
| work = IRS
| year = 1972
| publisher = Alcor Life Extension Foundation
| accessdate = 2009-08-23
| title = Alcor IRS letter}}</ref> In 1977, the name was changed to the Alcor Life Extension Foundation. In 1982, the Institute for Advanced Biological Studies (IABS), founded by [[Mike Darwin]] and Steve Bridge in Indiana, merged with Alcor. During the 1980s, Darwin worked with [[UCLA]] cardiothoracic surgery researcher [[Jerry Leaf]] at Alcor to develop a medical model for cryonics procedures. They pioneered the first consistent use of a cryonics procedure now known as a “standby”, in which a team waits to begin life support procedures at the bedside of a cryonics patient as soon as possible after the heart stops.

The oldest incorporated cryonics society still in existence is the [[American Cryonics Society]] (ACS). This [[Tax exemption|tax-exempt]] [[501(c)(3)]] membership organization was incorporated in 1969 as the Bay Area Cryonics Society (BACS) by a group of cryonics advocates that included two prominent Bay Area physicians, Dr. M. Coleman Harris and Dr. Grace Talbot. The first suspensions under BACS auspices were performed in 1974 by Trans Time, Inc., a for-profit company started by BACS members. BACS researcher Dr. Paul Segall, working with Jerry Leaf of CryoVita, developed a medical model to induce hypothermia shortly after pronouncement of death. Dr. Segall later went on to pioneer blood substitutes for use in both cryonic suspension and in mainstream medicine.

Cryonics received new support in the 1980s when MIT engineer [[Eric Drexler]] started publishing papers and books foreseeing the new field of [[molecular nanotechnology]]. His 1986 book, ''[[Engines of Creation]]'', included an entire chapter on cryonics applications.<ref name="Note7">{{cite book
| url = http://www.foresight.org/EOC/EOC_Chapter_9.html
| title = Engines of Creation, "A Door to the Future"
| year = 1986
| last = Drexler
| first = K. Eric
| publisher = Foresight Nanotech Institute
| accessdate = 2006-03-17}}</ref> Cryonics advocates saw the nascent field of nanotechnology as vindication of their long held view that molecular repair of injured tissue was theoretically possible.<ref>{{cite book
| last = Drexler
| first = K. Eric
| url = http://www.foresight.org/EOC/EOC_References.html#0156
| title = Engines of Creation, The Coming Age of Nanotechnology
| publisher = Foresight Nanotech Institute
| year = 1986
| accessdate = 2006-03-17}}</ref> In the late 1980s Alcor member [[Dick Clair]] (who was dying of AIDS) sued for, and ultimately won for everyone, the right to be cryonically preserved in the [[California|State of California]].<ref>{{cite web | last = Aurelio Munoz, Superior Court Judge | title = Case No.&nbsp;C&nbsp;697 147 | work = Library | publisher = Alcor Life Extension Foundation | date = October 25, 1990 | url = http://www.alcor.org/Library/pdfs/RoeVMitchellOrder25Oct1990.pdf | format = PDF | accessdate = 2008-08-22 }}</ref><ref>{{cite web | last = Mondragon | first = Carlos | title = A Stunning Legal Victory for Alcor | work = Library | publisher = Alcor Life Extension Foundation | month = November | year = 1990 | url = http://www.alcor.org/Library/html/LegalVictory.html | accessdate = 2008-08-22 }}</ref><ref>{{cite web | last = Justice Gates | title = Mitchell v. Roe Decision | work = Library | publisher = Alcor Life Extension Foundation | date = June 10, 1992 | url = http://www.alcor.org/Library/html/CaliforniaAppellateCourtDecison.html| accessdate = 2008-08-22 }}</ref> Alcor’s membership expanded tenfold within a decade, with a 30% annual growth rate between 1988 and 1992.

On July 24, 1988, a Ph.D. in [[computer science]] named Kevin Brown started an [[electronic mailing list]] called ''CryoNet''<ref>{{cite web
| url = http://www.cryonet.org/
| title = CryoNet
| accessdate = 2006-03-17}}</ref> that became a powerful tool of communication for the cryonics community. Numerous other mailing lists and web forums for discussing cryonics and the affairs of particular organizations have since appeared, but CryoNet remained a central point of contact for cryonicists until it was shut down on March 17, 2011.<ref>{{cite web|url=http://www.cryonet.org/|title=CryoNet – Cryonics Mailing List}}</ref>

Alcor was disrupted by political turmoil in 1993 when a group of activists left to start the CryoCare Foundation,<ref>{{cite web
| url = http://www.cryocare.org/index.cgi
| title = CryoCare Foundation
| accessdate = 2006-03-17}}</ref> and associated for-profit companies CryoSpan, Inc. (headed by Paul Wakfer) and BioPreservation, Inc.<ref>{{cite web
| url = http://www.cryocare.org/index.cgi?subdir=bpi&url=bpi.html
| accessdate = 2006-03-17
| title = BioPreservation, Inc. – Cryopreservation Services}}</ref> (headed by [[Mike Darwin]]). Darwin and collaborators made many technical advances during this time period, including a landmark study documenting high quality brain preservation by freezing with high concentrations of glycerol.<ref>{{cite web
| url = http://www.alcor.org/Library/html/braincryopreservation1.html
| title = Effect of Human Cryopreservation Protocol on the Ultrastructure of the Canine Brain
| last = Platt
| first = Charles
| publisher = Alcor Life Extension Foundation
| work = Cryocare, Report #4
| year = 1995
| accessdate = 2006-03-17}}</ref> CryoCare ceased operations in 1999 when they were unable to renew their service contract with BioPreservation. CryoCare’s two patients stored at CryoSpan were transferred to Alcor. Several ACS patients stored at CryoSpan were transferred to CI.

There have been numerous, often transient, for-profit companies involved in cryonics. For-profit companies were often paired or affiliated with non-profit groups they served. Some of these companies, with non-profits they served in parentheses, were Cryonic Interment, Inc. (CSC), Cryo-Span Corporation (CSNY), Cryo-Care Equipment Corporation (CSC and CSNY), Manrise Corporation (Alcor), CryoVita, Inc. (Alcor), BioTransport, Inc. (Alcor), Trans Time, Inc.<ref>{{cite web
| url = http://www.transtime.com/
| title = Trans Time, Inc.
| accessdate = 2006-03-17}}</ref> (BACS), Soma, Inc. (IABS), CryoSpan, Inc. (CryoCare and ACS), BioPreservation, Inc. (CryoCare and ACS), Kryos, Inc. (ACS), Suspended Animation, Inc.<ref>{{cite web
| url = http://www.suspendedinc.com/
| title = Suspended Animation, Inc.
| accessdate = 2006-03-17}}</ref> (CI, ACS, and Alcor). Trans Time and Suspended Animation are the only for-profit cryonics organizations that still exist.

The cryonics field seems to have largely consolidated around three non-profit groups, Alcor Life Extension Foundation, Cryonics Institute (CI), and the American Cryonics Society (ACS), all deriving significant income from bequests and donations. A newly formed non-profit group called the [[Cryonics Society]] was formally incorporated in 2006 but is devoted solely to promotion and public education of the cryonics concept.

As research in the 1990s revealed in greater detail the damaging effects of freezing, there was a trend to use higher concentrations of glycerol [[cryoprotectant]] to prevent freezing injury. In 2001 Alcor began using [[Cryopreservation#Vitrification|vitrification]], a technology borrowed from mainstream organ preservation research, in an attempt to completely prevent ice formation during cooling. Initially the technology could only be applied to the head when separated from the body. In 2005 Alcor began treating the whole body with their vitrification solution in a procedure called "neurovitrification with whole body cryoprotection".<ref>{{cite web
| url = http://www.alcor.org/Library/html/newtechnology.html
| title = New Cryopreservation Technology
| publisher = Alcor Life Extension Foundation
| accessdate = 2006-03-17}}</ref> In the same year, the Cryonics Institute began treating the head of their whole body patients with their own vitrification solution.<ref>{{cite web
| author=[[Ben Best]]
| title=The Cryonics Institute's 69th Patient
| url=http://www.cryonics.org/reports/CI69.html
| accessdate=2006-06-07}}</ref>

The Cryonics Institute maintains 103 human patients as of 1&nbsp;May 2011 (along with about 76 pets) at its [[Clinton Charter Township, Michigan|Clinton Township]], [[Michigan]] facility. About a fifth of the cryopreserved humans and a smaller portion of the pets came to the CI facility through contract with the American Cryonics Society (which has no storage facilities of its own).<ref name="CryoCompare">{{cite web | author=[[Ben Best]] | title = Comparing Procedures and Policies | publisher = [[Cryonics Institute]] | url = http://www.cryonics.org/comparisons.html | accessdate = 2011-07-09 }}</ref> On 1&nbsp;May 2011 Alcor currently was maintaining 104 cryonics patients in Scottsdale, Arizona.<ref name="CryoCompare" /> There are support groups in Europe, Canada, the United Kingdom, and Australia. There is also a smaller cryonics company in Russia called [[KrioRus]], which maintains 16 human patients and 7 pets,<ref name="CryoCompare" /> and there are plans for a facility in Australia. There are also plans being developed by renowned architect Stephen Valentine for a multi-acre futuristic high security facility called [[Timeship]]<ref>
{{cite web
| title = The Timeship Project
| url = http://www.timeship.org/site/project.html
| doi =
| accessdate = 2008-04-01}}
</ref> to be built in an undisclosed location in the United States, as well as for an underground facility in Switzerland. [http://www.transtime.com/ Trans Time], a small company, currently maintains 3&nbsp;cryonics patients.<ref name="CryoCompare" />

== Cryonics in popular culture ==

Procedures similar to cryonics have been featured in innumerable science fiction stories to aid space travel (in particular [[interstellar travel]]), or as means to transport a character from the past into the future. In addition to accomplishing whatever the character's primary task is in the future, he or she must cope with the strangeness of a new world, which may contain only traces of their previous surroundings. This prospect of alienation is often cited as a major reason for the unpopularity of cryonics.

Notable early science fiction short stories featuring human cryopreservation, deliberate or accidental, include [[Lydia Maria Child]]'s short story "Hilda Silfverling, A Fantasy" (1886),<ref>Full text of Lydia Maria Child's "Hilda Silfverling, A Fantasy" short story: [http://faculty.pittstate.edu/~knichols/hilda.html] Accessed March 9, 2010</ref> Jack London's first published work "[[A Thousand Deaths]]" (1899), V. Mayakovsky's "Klop" (1928),<ref>[http://briefly.ru/majakovskij/klop/ Briefly.ru]</ref> H.P. Lovecraft's "[[Cool Air]]" (1928), and Edgar Rice Burroughs' "[[The Resurrection of Jimber-Jaw]]" (1937). Many of the subjects in these stories are unwilling ones, although a 1939 short story by [[Neil R. Jones]] called "The Jameson Satellite",<ref>{{cite journal
| author = Neil R. Jones
| month = July
| title = The Jameson Satellite
| journal = Amazing Stories
| url = http://thenostalgialeague.com/olmag/jameson.html
| accessdate = 2010-03-14
| year = 1931}}</ref> in which the subject has himself deliberately preserved in space after death, has been credited with giving [[Robert Ettinger]] the seed of the idea of cryonics, when he was a teenager. Ettinger would later write a science fiction story called ''The Penultimate Trump'', published in 1948, in which the explicit idea of cryopreservation of legally dead persons for future repair of medical causes of death is promulgated.<ref>Full text of Ettinger's "Penultimate Trump" short story: [http://www.cryonics.org/Trump.html] Accessed June 8, 2007</ref>

Relatively few stories have been published concerning the primary objective and definition of cryonics, which is medical time travel. The most indepth novel based on contemporary cryonics is national best-seller ''[[The First Immortal]]'' by [[James L. Halperin]] (1998). Other novels include ''[[The Door into Summer]]'' by [[Robert A. Heinlein]] (1954), ''[[The Age of the Pussyfoot]]'' by [[Fred Pohl]] (1966) and ''[[Ubik]]'' by [[Philip K. Dick]] (1968), ''[[Tomorrow and Tomorrow]]'' by [[Charles Sheffield]] (1997), ''Chiller'' by Sterling Blake (a.k.a. [[Gregory Benford]]) (1993), ''Tech-Heaven'' by [[Linda Nagata]] (1995), ''Ralph’s Journey'' by David Pizer, ''Formerly Brandewyne''<ref>{{cite web | title = Formerly Brandewyne | publisher = Lee Books | year= 1987 | url = http://www.judesplace.com/excerpt.htm }}</ref> by Jude Liebermann, and ''I Was a Teenage Popsicle'' by Bev Katz Rosenbaum.<ref>ISBN 0425211800
Publisher: Berkley Jam</ref> A fictional book about cryonics specifically for children is ''21st Century Kids'' by [[Shannon Vyff]].<ref>{{cite web | title = 21st Century Kids | publisher = 21CenturyKids | year= 2007 | url = http://www.21stcenturykidsbook.com/ | accessdate =2007-03-08 }}</ref><ref>{{cite book | authorlink = Shannon Vyff | title = 21st Century Kids | publisher = [[Warren Publishing]] | date= 2007-03-15 | isbn = 1886057001 | author = Shannon Vyff.}}</ref>

Fictional application of cryonics as rescue after freezing in space has continued since ''The Jameson Satellite'' in 1931. [[Arthur C. Clarke]]'s ''[[3001: The Final Odyssey]]'' reveals that [[Frank Poole]], murdered by [[HAL 9000]] in ''[[2001: A Space Odyssey]]'' was cryopreserved by his exposure to space, and found and revived a thousand years later. The [[Larry Niven]] short story "Wait It Out" depicts a sort of emergency self-cryopreservation by men marooned on Pluto. The 1992 Hugo-winning novel ''[[A Fire Upon the Deep]]'' by [[Vernor Vinge]] features a protagonist who is resuscitated by a superintelligence, thousands of years after a spaceship accident. [[Stanisław Lem]] described cryonic hibernation during space travel in his novel ''[[The Invincible]]'', and used cryonic preservation (using device named in a way to suggest [[vitrification]]) as a major plot element in his novel ''[[Fiasco (novel)|Fiasco]]''. Cryonics has also been used in [[Eoin Colfer|Eoin Colfer's]] ''[[Artemis Fowl: The Eternity Code]]'' (referred as "cryogenics" in the book); [[Domovoi Butler]] was frozen by [[Artemis Fowl II|Artemis Fowl]] after being shot and then revived by [[Captain Holly Short]].<ref>{{AF Cite Book | publisher =Puffin Books | booknumber =3 | year =2006}}</ref> In the 1999 video game [[Homeworld]], released by Relic Entertainment, the native residents of the planet Kharak use cryogenic preservation to preserve and store hundred of thousands of people in 'cryo trays' for transport aboard the Mothership, a large colony ship to take them to their ancestral homeworld, Hiigara. In the 2001 videogame [[Halo: Combat Evolved]], Master Chief is woken from cryo as the Covenant attacks his ship. Also, Halo 3's legendary ending shows Chief and Cortana trapped in a ship as the Chief goes into cryo after telling Cortana to "Wake me if you need me."

Movies featuring cryonics for medical purposes include the [[Woody Allen]] comedy, ''[[Sleeper (film)|Sleeper]]'' (1973), and the films ''[[Late for Dinner]]'' (1991),<ref>{{cite web
| url = http://www.imdb.com/title/tt0102279/
| title = Late For Dinner
| publisher = IMDb
| accessdate = 2010-03-14}}</ref> ''[[Open Your Eyes (1997 film)|Open Your Eyes]]'' (''Abre los Ojos'' 1997, remade as ''[[Vanilla Sky]]'', 2001) and ''[[Wes Craven's Chiller]]'' (1985). Another movies featuring a cryonics-like process was ''[[Forever Young (film)|Forever Young]]'' (1992), starring Mel Gibson. A "CryoPrison" is where inmates are kept away from society and mentally reformed during their preservation in the film'' [[Demolition Man (film)|Demolition Man]]'' (1993), while cryopreservation is used during space travel in the James Cameron films ''[[Aliens (film)|Aliens]]'' (1986) and ''[[Avatar (2009 film)|Avatar]]'' (2009). ''[[Pandorum]]'' (also 2009) features a form of cryopreservation which, upon waking from, subjects are left disoriented, with amnesia lasting anywhere from days to months, and, in rare instances, suffering from "Pandorum" a type of psychosis. Although not about cryonics per se, the [[Ron Howard]] film ''[[Cocoon (film)|Cocoon]]'' (1985) has been hailed by cryonics advocates as expressing the values motivating cryonics better than any other film.<ref>{{cite book
| url = http://www.alcor.org/cryonics/cryonics8508.txt
| title = Cryonics
| publisher = Alcor Life Extension Foundation
| year = 1985
| edition = Volume 6 Issue 61
| accessdate = 2006-03-17}}</ref>

On television, cryonics has appeared occasionally since the late 1960s. An episode of ''[[The Saint]]'' called 'The Man Who Gambled With Life' was made in mid-1968 and focused on a dying multi-millionaire who has himself cryonically preserved. In 1977, an episode of ''[[Barney Miller]]'' included a member of the "Metropolitan New York Cryonic Society".<ref>{{IMDb title|518997|Atomic Bomb}}</ref> Producer [[David E. Kelley]] wrote well-researched portrayals of cryonics for the TV shows ''[[L.A. Law]]'' (1990),<ref>{{cite web
| url = http://www.imdb.com/title/tt0624130/
| title = L.A. Law The Good Human Bar (1990)
| publisher = IMDb
| accessdate = 2006-03-17}}</ref> ''[[Picket Fences]]'' (1994),<ref>{{cite web
| url = http://www.imdb.com/title/tt0674696/
| publisher = IMDb
| title = Picket Fences Frosted Flakes (1994)
| accessdate = 2006-03-17}}</ref> and ''[[Boston Legal]]''
(2005);<ref>{{cite web
| url = http://www.imdb.com/title/tt0530525/
| title = Boston Legal Let Sales Ring (2005)
| publisher = IMDb
| accessdate = 2006-03-17}}</ref> in each case, there was a dying plaintiff petitioning a court for the right to elective [[cryopreservation]]. Cryonics was also featured on ''[[Miami Vice]]'' (1987),<ref>{{IMDb title|647118|The Big Thaw}}</ref> ''[[SeaQuest DSV]]'' (1994),<ref>{{IMDb title|696961|When We Dead Awaken}}</ref> and the ''[[Star Trek: The Next Generation]]'' episode "[[The Neutral Zone (Star Trek: The Next Generation)|The Neutral Zone]]" (1988). In the pilot episode of ''[[Misfits of Science]]'' (1985), Arnold "Beef" "Ice Man" Beifneiter was a cryopreserved subject from 1937 who, upon waking, is left simple-minded and with the power to freeze anything he touches, though vulnerable to warmer temperatures and kept cold in an ice cream truck. An episode of ''[[The Golden Girls]]'' includes all four eponymous women cryogenically preserved, but Dorothy, Blanche, and Rose saving only their heads. Sophia, whose body remains intact, informs them they needed "to tip the guy" to be fully preserved. On British TV, cryonics appeared in the last two television works of [[Dennis Potter]], ''[[Karaoke (TV serial)|Karaoke]]'' and ''[[Cold Lazarus]]'' (both 1996), and the long-running series ''[[Doctor Who]]'', as well as its spin-off ''[[Torchwood]]''. Cryonics was also satirized by the American comedy cartoon series ''[[Futurama]]'', with the main character Philip J. Fry accidentally being frozen for 1,000 years, to wake up in the year 2999. The title character [[Aang]] in the animated series ''[[Avatar: The Last Airbender]]'' and [[The Last Airbender|its live action film adaptation]] saved himself from drowning in a tempest by creating an ice bubble, preserving him for about a hundred years. ''[[Aurora(telenovela)|Aurora]]'', a Spanish-based telenovela by telemundo deals with cryonics. A 20 year old woman is frozen and revived 20 years later, to fall in love with the son of her past love.<ref>http://msnlatino.telemundo.com/novelas/Aurora</ref>

The most famous known cryopreserved patient is baseball player [[Ted Williams]]. The popular [[urban legend]] that [[Walt Disney]] was cryopreserved is false; he was cremated, and interred at [[Forest Lawn Memorial Park (Glendale)|Forest Lawn Memorial Park Cemetery]].<ref>[http://www.snopes.com/disney/info/wd-ice.htm Snopes.com]</ref> [[Robert A. Heinlein]], who [[The Door into Summer|wrote enthusiastically]] of the concept, was cremated and had his ashes distributed over the Pacific Ocean. [[Timothy Leary]] was a long-time cryonics advocate, and signed up with a major cryonics provider. He changed his mind, however, shortly before his death, and so was not cryopreserved.

==See also==
* [[Cryogenics]]
* [[Cryptobiosis]]
* [[Extropianism]]
* [[Hibernation]]
* [[Suspended animation]]
* [[Indefinite lifespan]]
* [[Information-theoretic death]]
* [[KrioRus]]
* [[Nanomedicine]]
* [[Neuropreservation]]
* [[Supercooling]]
* [[Cryopreservation#Vitrification]]

==References==
{{Reflist|2}}

==External links==
{{External links|date=December 2010}}
* [http://www.alcor.org/ Alcor Life Extension Foundation], alcor.org
* [http://www.americancryonics.org/ American Cryonics Society], americancryonics.org
* [http://www.benbest.com/cryonics/CryoFAQ.html Cryonics FAQ], benbest.com
* [http://www.cryocdn.org/ Cryonics Society of Canada], cryocdn.org
* [http://www.cryonics-europe.org/ Cryonics Europe], cryonics-Europe.org
* [http://www.cryonicssociety.org/ Cryonics Society – Resources and Advocacy], cryonicssociety.org
* [http://www.cryonics.org/ Cryonics Institute], cryonics.org
* [http://www.cryonics-uk.com/ Cryonics UK], cryonics-uk.com
* [http://cryonics.com.pt/Front%20page.htm Alcor in Portugal], cryonics.com.pt
* [http://cryofreedom.ru CryoFreedom], CryoFreedom.ru
* [http://www.cryonet.org/ CryoNet.org]
* [http://depressedmetabolism.com/ Depressed Metabolism (cryonics technology blog)], depressedmetabolism.com
* [http://www.imminst.org/forum/index.php?s=&act=SF&f=61 Immortality Institute Cryonics], imminst.org
* [http://www.kryoniikka.fi Finnish Cryonics Society], kryoniikka.fi
* [http://www.merkle.com/cryo/ Ralph Merkle's introduction to cryonics], merkle.com
* [http://www.transtime.com/ Trans Time] transtime.com
<!-- Link suspended[http://www.cryonics.org.au/node/2 Cryonics Association of Australia FAQ] -->
* [http://kriorus.ru/en/ KrioRus], the first cryonics company in Eurasia
* {{it}} [http://www.lifext.org ''LIFEXT Research Group''], lifext.org – Sito di riferimento italiano sulla Crionica, con Progetti di Ricerca, Divulgazione, Studio & Creazione di Gruppi di Supporto.

{{Life extension}}
{{Death}}
{{Emerging technologies}}

[[Category:Cooling technology]]
[[Category:Cryonics| ]]
[[Category:Death customs]]
[[Category:Life extension]]
[[Category:Science fiction themes]]
[[Category:Emerging technologies]]

[[ca:Criònica]]
[[cs:Kryonika]]
[[de:Kryonik]]
[[es:Criónica]]
[[eo:Krioniko]]
[[fa:سرمازیستی]]
[[fr:Cryonie]]
[[ko:인체냉동보존]]
[[it:Crionica]]
[[he:קריוניקה]]
[[ml:ക്രയോണിക്സ്]]
[[nl:Cryonisme]]
[[ja:人体冷凍保存]]
[[pl:Krionika]]
[[pt:Criônica]]
[[ru:Крионика]]
[[sq:Krionika]]
[[simple:Cryonics]]
[[sk:Kryonika]]
[[fi:Kryoniikka]]
[[sv:Kryonik]]
[[uk:Кріоніка]]
[[zh-yue:人體冷凍技術]]
[[zh:人體冷凍技術]]

Revision as of 10:36, 9 October 2011

[[File:Exampl[[File:[[File:[[File:[[File:[[File:[[File:[[File:[[File:[[File:[[File:[[File:[[File:[[File:--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)--82.13.145.35 (talk) 10:36, 9 October 2011 (UTC)]]]]]]]]]]]]]]]]]]]]]]]]]]e.jpg]]