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As of now, cryonics has not been successfully tested or fully validated on any mammal, including humans. While there has been research in cryopreservation, especially with small organisms like nematodes and simple tissues like embryos and sperm cells, the cryopreservation and revival of an entire mammal (let alone a human) has not been achieved.
Cryonics refers to the preservation of bodies or brains at extremely low temperatures with the hope that future medical advancements will enable them to be revived and cured of the conditions that led to death. However, the freezing process causes significant damage to cells, tissues, and organs due to ice crystal formation and other factors.
Here are some relevant details on cryonics in relation to mammals:
1. Organ Preservation: Some progress has been made with organ cryopreservation in mammals. For example, rabbit kidneys have been cryopreserved and later transplanted with some success, but the organs were not fully functional, and significant damage occurred.
2. Vitrification: A technique called vitrification, which avoids ice formation by cooling biological tissue rapidly to a glass-like state, has shown some promise. Vitrification has been used in the cryopreservation of embryos, eggs, and small tissues, but it is much harder to apply to larger, more complex organs and whole animals.
3. Revival: The main barrier is not just preservation but revival. Even if a mammal were successfully frozen without damage, we currently lack the technology to revive them. As of now, no mammal has ever been successfully frozen and revived without suffering irreparable damage.
In short, while there has been some progress in related fields, cryonics has not yet been successfully tested on any mammal. It remains a highly speculative field.
t. ChatGPT