View Single Post
Old 12-27-2017, 04:23 PM
SamuelA is offline
Join Date: Feb 2017
Posts: 3,726
Originally Posted by k9bfriender View Post
What research? Dropping things into a cold dewar doesn't need much practice.

I might suggest that we try liquid helium, at least for initial freezing, as that would make it freeze faster and lead to less crystallization, but that's pretty much it, research done.
Rapid freezes preserves living things. But it has to be rapid - slow freezing allows ice crystals to damage them.

So the thing to be researched is how to rapidly freeze a volumetric object like a brain. You cannot just dunk it into liquid nitrogen or helium - only the outer part will freeze rapidly, the inner parts will be crushed by expanding ice crystals and the data you are trying to preserve is damaged* or lost.

One promising method is magnetic refrigeration. You would run oxygenated cold fluid through a brain, with drugs to force the arterioles to stay open. Similar to conditions for bloodless surgery, where patients can be revived. You prevent the ice from forming with very powerful magnetic fields that are oscillating - the oscillating heats the liquid, keeping the water a liquid, even though the supply liquid would be below freezing.

Turn off the magnet (send the current to resistors) and you should get immediate, rapid, demolition-man style instant freezing.

Revival has to be done a similar tricky way. You would have had to leave metal containing nanoparticles that are non-toxic inside all these blood vessels. Then through magnetic induction, evenly heat the whole volume.

If you don't heat quickly enough, the same problem with ice crystals happens when you rewarm.

As you can imagine, actually doing this physically and getting someone to wake up with enough intact tissue to prove they lived through the experience would be a colossal, multi-billion dollar effort. But you only need do it a few times. Then you could start a mass freezing program for all patients, not reviving them (since revival is going to do a lot of damage) until some future date when you can also treat all their diseases and replace their missing body.

And if you're wondering, this basic idea is mine, but the proof that it might work is here :

Here's a video of it working :

*you might be able to recover the original synaptic states computationally if you had an atom by atom scan of the whole thing, but the original person is dead.

Last edited by SamuelA; 12-27-2017 at 04:26 PM.