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quanticle comments on A survey of anti-cryonics writing - Less Wrong
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I'm having the same problem. All the studies I've looked at have only studied the plausibility of cryonics. None have actually attempted to freeze and thaw a mammal (or any other warm blooded animal). All the examples of "natural" cryonic preservation deal with cold blooded animals (usually frogs or fish).
Can anyone point me to studies showing that cryogenic freezing and thawing in warm blooded creatures is possible? I'd hate to throw down a bunch of money on a cryonics policy, only to end up dead anyway, because the freezing process permanently damaged my tissues.
Not an entire mammal, but Greg Fahy has cryopreserved a kidney, brought it back and shown a rabbit able to live using it as its sole kidney.
Perhaps just as importantly for this whole discussion, nematodes have been shown to survive cryopreservation, with "memories" intact.
Very interesting! Again, not LN2 temperatures though.
EDIT: I'm wrong - thanks for the correction!
The abstract I linked to does mention LN2. Though I'm not sure how much difference various sub-freezing temperatures make, if our concern is how well the current protocols of cryonics can protect the brain against freezing damage.
I Googled for articles concerning nematodes because they're the standard "simplest organism with a nervous system", and this was among the first hits, filtering to exclude all publications by cryonicists.
What would be the next "higher" organism someone might have tried that on, that also has a nervous system?