To some, cryonics represents the pinnacle of science fiction and human overreach. To others, it's a bold wager on future technology to defy death. This practice—formally known as cryonics—involves storing the bodies of deceased individuals at ultra-low temperatures, with the hope that scientific advances will one day enable their revival. It's a highly divisive concept, hinging on uncertain technological progress and accessible only to a select few ultra-wealthy individuals. Here's what you need to know.
Cryonics traces its roots to science fiction, inspired by space exploration visions where astronauts could hibernate for years or decades without aging. In 1962, Robert Ettinger, now hailed as the father of cryonics, published The Prospect of Immortality, advocating for its development. The first real-world application came in 1967 when James Bedford, an American academic, became the world's first person cryogenically preserved. Despite early criticism from the scientific community, belief in technological progress—and natural examples like Siberian salamanders surviving years in permafrost—kept the idea alive.
In the decades that followed, companies offering cryonics services emerged amid controversy. Robert Nelson, founder of the Cryonics Society of California, became a reluctant spokesman despite his lack of scientific credentials. He faced lawsuits from families after nine clients decomposed in a faulty vault due to funding shortfalls. These early stories often reveal the desperation of grieving loved ones clinging to any hope against death.
Though rare due to its immense costs and uncertain timelines, cryonics persists today, with around 350 individuals cryogenically preserved worldwide (mostly in the U.S., some in Russia) and thousands more signed up via contracts.
The core principle remains: death isn't instantaneous and irreversible but a process that could be reversed. Procedures have evolved since those early days, claim proponents, using more sophisticated methods than pioneers like Nelson.
Supporters emphasize that cryonics must begin within six hours of clinical death to minimize tissue degradation, ideally on patients with imminent death from terminal illness. It's impractical for sudden accidents, though some carry directives for it. Cryonics on living people is illegal worldwide, but advocates push for legal changes to preserve healthier tissues. Specialized firms typically respond at the death site or on their premises.
The process starts by artificially maintaining circulation to protect the brain, while immersing the body in an ice bath. Blood and water are then replaced with cryopreservative solutions to prevent damaging ice crystal formation at storage temperatures. These enable a glass-like "vitrified" state, avoiding molecular disruption that harms tissues in standard freezing.
Vitrification technology, refined since 2004, has nearly eliminated ice crystals in brains, though it's limited to certain tissues due to perfusion challenges and solution toxicity.
Temperatures are then gradually reduced to -196°C, storing the body in dewars until revival—a major hurdle, as current tech can't repair process-induced damage. Bodies are regularly scanned for integrity.
Undeterred, nonprofits like Alcor and the Cryonics Institute (U.S.) and for-profits like KrioRus (Russia) offer full-body or neuropreservation (head/brain only). Focus has shifted to brains as the seat of memory, identity, and consciousness, assuming advanced civilizations could regrow bodies. Some even preserve pets, for tens of thousands of dollars.
Cryonics remains a speculative endeavor: we can't preserve more than cells at these temperatures without damage. Proponents bet on breakthroughs in revival and repair tech, plus philosophical advances in understanding consciousness—will a revived person truly be "the same"?
The scientific consensus views it as pseudoscience, citing brain complexity and sustainability issues resembling Ponzi schemes reliant on new funding.
Legality varies: prohibited in France and many countries, despite laws allowing personal funeral choices. France's 1887 law permits burial, cremation, or body donation to science, but case law (e.g., Dr. Martinot's failed attempts in 1984 and 2002) deems cryonics against public order, as ruled by the Council of State in 2006.
