system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't we freeze people and revive them in the future?

It's one of the staples of science-fiction, yet I'm fairly certain it doesn't quite work the way it seems. Help ELI5!
gpt
When you freeze bodies, the fluids form ice crystals which expand and break cell walls.



The freezing process damages everything essentially.





They are looking for some form of natural antifreeze to prevent this but they don't have anything that works for humans.



There are some animals/frogs that can be frozen and restored due to a natural antifreeze they create.