Cryonics
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This might more properly be termed a subset of Life Extension. Rather than linger on in a deteriorating state, better to be frozen for when reanimation technology can supply a fix for what ails you; if need be, all the way to waiting for a cloned body or being download as an eternal computer sentient. Those already frozen have likely been too damaged by the freezing process to be resurrected into fully functioning form, but who knows what super science lies ahead. What would be truly needed for public acceptance would be definitive demonstration of reanimation of some properly prepared primate; this could come tomorrow or a hundred years from now, or never. What is needed more than anything is some breakthrough in cryo-preparation, some compound that simultaneously keeps cell destroying ice crystals from forming, while having thermal expansion characteristics that keep large scale fractures from occurring in solids frozen at liquid nitrogen temperatures. Perfecting cryonics would not likely bring an immediate change in day to day life, but if it did remove the certainty of death, it would have huge philosophical and religious repercussions.
Life Extension and Cryonics both have the potential to concentrate the accumulation of wealth with a privileged elite. Alcor, by far the most prominent (perhaps only viable) cryonic suspension service requires a large deposit to create a minimum trust fund to pay for ongoing suspension service and to provide support for the client once reanimated. Given the nature of compound interest, and if thousands or millions of people locked up significant portions of wealth in reanimation funds, likely laws would be changed to appropriate said funds. Likely the largest long-term challenge to being reanimated isn't the eventual science, but the political climate which may prefer to leave sleeping dogs lie.
Despite the sci-fi sound of cryonics there has been slow steady progress in this area, and what has been learned is increasing our ability to store organs for eventual transplant, making more transplants viable and available. Likely organ storage will arrive before true full-body suspended animation. We have been able to cryogenically store tissues, sperm, and ovum for decades now. There are no known scientific reasons larger more ordered organic structures couldn't be prepared to survive cryonic storage. Still this is a long horse. I personally would bet on this horse (currently there is no other horse if you are an atheist or agnostic), and expect cryo-preservation methods to improve dramatically in the next 30 years. But when I step into the Big Chill, I wouldn't expect to wake up for at least 100 years. Currently the government won't allow you to take the Chill Solution until you are actually dead, but the damage your brain undergoes while awaiting this most traumatic of experiences is likely to be a problem. Future medicine might be able to repair any brain damage, but not memories lost to it. What makes you you might be gone.
On a personal note I once took a trip into possible personal oblivion that I imagine surrendering to Cryonic Suspension would be like. I lay down to be anesthetized for lung surgery, I barely got to 97 counting backwards from 100. There was no sensation of dreaming or passage of time. I opened my eyes, almost feeling as though I had only blinked, but was aware that whatever had transpired had transpired, this from the tightness in my chest and nausea. Luckily I awoke with no-cancer and two intact lungs, despite dire predictions from my radiologist -- a benign fungal infection call histoplasmosis had caused the blip on an earlier PET scan.
It is a belief of mine that the universe plays out all possibilities. So one Larry (me) goes into the super cold nitrogen soup and from that point the universe continues to branch and evolve. In most of those universes the cryonic suspension is not maintained and those Larrys become worm food. But it doesn't matter. It only takes one unlikely universe to evolve where the nitrogen pumps and coolers remain active as long as needed and reanimation methods are perfected. The one lucky Larry awakens who is still me, but unaware of all my quantum clones that traveled into futures with less favorable outcomes (see MWI many worlds interpretation of quantum mechanics). Perhaps there are other Larry's that woke up from lung surgery with less good news than I received, and I am the lucky Larry travelling towards an eventual future that also includes a sleepover in a bed of liquid nitrogen.
Here is how I would place the odds of cryonic reanimation of primate or human:
10 Years 1%
20 Years 5%
50 Years 10%
100 Years 40%
1000 Years 90%
Never 5% (science quits progressing, mankind goes extinct)
Of course time to reanimation is not the important variable, only that those who go for a nitrogen nap are properly prepared and sustained.
Wikipedia.org in depth entry for Cryonics
Current Cryonics News






