Tom Scott made a great video about it, he even got to the guy who started using microwaves for thawing entire small animals. Before microwaves (diathermic heati

Tom Scott made a great video about it, he even got to the guy who started using microwaves for thawing entire small animals. Before microwaves (diathermic heating) they would use a hot piece of metal, like a large spoon. https://youtu.be/2tdiKTSdE9Y https://youtu.be/2tdiKTSdE9Y And yes, you can unfreeze a rock solid rat, then see it walk around. This is why cryogenics was hyped so much, because it sort of works on small animals.