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categories: ["longevity", "bodies"]categories: ["longevity", "bodies"]tags: ["cryopreservation", "vitrification", "life extension", "death", "cryobiology", "revival"]tags: ["cryopreservation", "vitrification", "life extension", "death", "cryobiology", "revival"]summary: "The practice of preserving legally dead people at cryogenic temperatures in the hope that future medicine can repair and revive them."summary: "The practice of preserving legally dead people at cryogenic temperatures in the hope that future medicine can repair and revive them."updated: "2026-07-27"updated: "2026-08-23"humanEvidence: "Fewer than a thousand people have been cryopreserved and none has been revived; no mammal has been recovered from cryogenic temperature, and the strongest whole-organ result is a vitrified rat kidney rewarmed and transplanted."humanEvidence: "Fewer than a thousand people have been cryopreserved and none has been revived; no mammal has been recovered from cryogenic temperature, and the strongest whole-organ result is a vitrified rat kidney rewarmed and transplanted."access: "Sold by a handful of member organizations; Alcor's minimum funding is $200,000 whole-body and $80,000 neuro, the Cryonics Institute charges several times less, and most members pay by life insurance."access: "Sold by a handful of member organizations; Alcor's minimum funding is $200,000 whole-body and $80,000 neuro, the Cryonics Institute charges several times less, and most members pay by life insurance."reversibility: "irreversible"reversibility: "irreversible"lines 97–102 → 97–10682 unchanged lines not shown
## Current state## Current state Fewer than a thousand people are in cryopreservation worldwide, held by a small number of organizations: Alcor in Arizona, the Cryonics Institute in Michigan, Tomorrow Bio in Europe, and smaller operations elsewhere including Australia's first case in 2024. Several thousand more are signed up as members. Growth has been slow and roughly linear for decades, not exponential.Fewer than a thousand people are in cryopreservation worldwide, held by a small number of organizations: Alcor in Arizona, the Cryonics Institute in Michigan, Tomorrow Bio in Europe, and smaller operations elsewhere including Australia's first case in 2024. Several thousand more are signed up as members. Growth has been slow and roughly linear for decades, not exponential. ```figure{"key": "kriorus-cryostorage", "caption": "Storage at KrioRus outside Moscow. The vessels are passive vacuum flasks topped up with liquid nitrogen rather than powered freezers, which is why storage itself is the cheap and failure-tolerant part of the practice."}``` [[alcor]], which was led from 2011 to 2020 by the philosopher [[max-more]], sets minimum funding at $200,000 for whole-body preservation and $80,000 for neuropreservation — the head alone, on the reasoning that a future capable of reviving anyone can also grow a body, an assumption that leans on [[lab-grown-organs]]; the Cryonics Institute charges several times less than Alcor for whole-body. Most members fund it with a life insurance policy naming the organization as beneficiary, which converts a large capital cost into a modest premium. Whether that makes the practice broadly available or merely cheap for the already insured is one instance of the [[access-and-inequality]] problem that runs through life-extension technology.[[alcor]], which was led from 2011 to 2020 by the philosopher [[max-more]], sets minimum funding at $200,000 for whole-body preservation and $80,000 for neuropreservation — the head alone, on the reasoning that a future capable of reviving anyone can also grow a body, an assumption that leans on [[lab-grown-organs]]; the Cryonics Institute charges several times less than Alcor for whole-body. Most members fund it with a life insurance policy naming the organization as beneficiary, which converts a large capital cost into a modest premium. Whether that makes the practice broadly available or merely cheap for the already insured is one instance of the [[access-and-inequality]] problem that runs through life-extension technology. removed, struck through added, underlinedLine numbers count the serialised markdown of each revision, frontmatter included.
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