Posting my favorite cryogenics story of all time.
Comment on Soup
Zoop@beehaw.org 4 months ago
Here’s a link to the article in the screenshot, in case anyone else was interested in reading it like I was: www.freethink.com/…/cryogenically-frozen-humans
at_an_angle@lemmy.one 4 months ago
01189998819991197253@infosec.pub 4 months ago
Thanks for this. Quite gruesome, but not at all unexpected. I remember having a conversation with a friend of mine a while back, where I made the argument that water expands when frozen and, since humans are mostly water, freezing a human would crack every vital organ. I’m actually upset to discover I was right.
dev_null@lemmy.ml 4 months ago
This is true, which is why preservation does not involve freezing, except for the bad attempts in the 70s the article talks about, which could never work. The bodies are vitrified, not frozen.
01189998819991197253@infosec.pub 4 months ago
That actually doesn’t sound much better to me, but my understanding of vitrification is minimal, at best. Still cool, though.
TheHooligan95@lemmy.dbzer0.com 4 months ago
there could be a way maybe, by freezing water while keeping it extremely pressurized, you can make “efficient ice” that occupies less space, called ice VII, I’m not kidding.
IrritableOcelot@beehaw.org 4 months ago
Cryoprotectants also do this pretty efficiently – they prevent crystallization, which leads to “vitreous” ice, which has more or less the same structure as liquid water and so doesn’t expand much. I think they do use that when freezing people, but the problem is that even if you fill the blood vessels with pure ethylene glycol, it diffuses very slowly, and it takes hours to get into cells which are far from large blood vessels. They dont diffuse the cryoprotectant in that thoroughly, though, because that’d take so long the body would have started to decay too much.
Natanael@slrpnk.net 4 months ago
Flash freezing can work, but it’s almost impossible for something as large as a human body.
interdimensionalmeme@lemmy.ml 4 months ago
It’s fine, as long as the temperature stays stable and no further damage is done. We’re not going to revive their flesh. Instead we’re going to chop them off in large chunks. Suspend them in a kind of agar. Then laser off 2nanometer at a time. Scan the surface with 1nm resolution PiFM or better method. That’s going to yield many terabytes of image data that you can turms into a neural map of the entire nervous system. Even mapping this data to today’s LLM would get something roughly able to speak like the corpse. The better this data processing gets the more real the resurrected sentiences will be.
wahming@monyet.cc 4 months ago
That’s assuming the freezing process hasn’t irreparably damaged the brain structure, which I don’t think anybody can confidently assert at the moment.
01189998819991197253@infosec.pub 4 months ago
This sounds pretty amazing. Do you have any sources (or process names that I can search)? I would love to read more into the LLM part of your statement. Seriously sounds like scifi, and I’m loving it.
interdimensionalmeme@lemmy.ml 4 months ago
Visible human project for the 1993 first experiment 2013 slice culture modeling of central nervous system 2019 visible human body slice segmentation method 2022 scalable mapping of myelin and neuron density inthe human brain with micrometer resolution
In fiction We are legion, we are Bob Fun book but novice writer
Probably covered by futurist youtuber isaac arthur, probably part of the mind upload episode