Cryonics: The Only Paradigm That Pauses Biology
Cryonics stops all biological processes and defers restoration to future technologies; its variants differ in what substrate they preserve, and the entire approach is a bet on tech that does not yet exist.
Cryonics stops all biological processes and defers restoration to future technologies. Among aging interventions, it is the only one that operates on halted biology.
The goal: preserve the biological substrate when the organism ceases to function, so future technologies can revive or substitute the failed parts. That substrate, depending on the approach, is the whole body, the brain, or the connectome (the map of neural connections).
The variants differ in what they preserve and how. Whole-body cryopreservation (Alcor, Cryonics Institute, Tomorrow Biostasis) keeps the entire body. Neuropreservation keeps only the brain. Aldehyde-stabilized cryopreservation (Nectome) preserves the connectome. Plastination and vitrification are variants of the preservation method itself.
For cryonics to work, preservation must retain enough structure for later restoration. Then future technologies must be able to restore an organism from that preserved substrate. This is a bet on technologies that do not yet exist.
Cryonics is the only longevity pathway that does not operate on active biology, creating a unique two-bet structure where preservation quality is testable but revival has no evidence at all; the variant tree (whole-body vs connectome) maps to a concrete question about preservation sufficiency that the idea layer can track as sub-nodes mature.