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Cryonics: Life Extension Explained

September 13, 2023

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Welcome to the frosty world of cryonics! It's a place where science fiction meets reality, where the impossible becomes possible, and where the line between life and death gets a little blurry. So, buckle up, because we're about to embark on a journey into the chilly depths of this fascinating field.

Now, you might be wondering: what exactly is cryonics? Well, in the simplest terms, it's the low-temperature preservation of humans and animals who can no longer be sustained by contemporary medicine, with the hope that future technologies can restore them to full health. It's a bit like putting someone on ice, but with a lot more science involved!

History of Cryonics

The concept of cryonics has been around for quite some time. It was first proposed by Robert Ettinger in his 1962 book "The Prospect of Immortality", where he suggested that freezing people could be a way to reach future medical technologies. And while his ideas were initially met with skepticism, they eventually led to the formation of the Cryonics Institute and the Alcor Life Extension Foundation, two of the leading organizations in the field today.

Over the years, cryonics has seen its fair share of controversy and criticism. But despite the challenges, it has continued to evolve and grow, with a number of notable figures, including scientists, entrepreneurs, and futurists, expressing interest in the procedure. So, while it may not be mainstream just yet, it's certainly making waves in the world of life extension.

The First Cryopreservation

The first cryopreservation took place in 1967, when Dr. James Bedford, a psychology professor, was frozen after his death from cancer. Bedford's body was preserved at -196 degrees Celsius, a temperature at which all biological activity, including the biochemical reactions that would lead to death, stops. His body remains in cryopreservation to this day, making him the longest-tenured "patient" in the history of cryonics.

Bedford's preservation marked a significant milestone in the field of cryonics. It demonstrated that it was possible to preserve a human body for an extended period of time, opening the door for further research and development in the field. However, it also raised a number of ethical and legal questions, many of which are still being debated today.

Development of Cryonics Technology

Since the first cryopreservation, cryonics technology has come a long way. Early methods of freezing often resulted in significant damage to the body's cells, due to the formation of ice crystals. However, modern techniques use a process called vitrification, which involves replacing the body's water with a cryoprotectant solution to prevent ice formation. This results in a glass-like state of preservation, which is much less damaging to the cells.

Additionally, cryonics organizations have developed sophisticated procedures for the initial stabilization and cooling of patients, as well as long-term care protocols for those in cryopreservation. These advancements have made cryonics a more viable option for those interested in life extension, although it remains a highly experimental field.

How Cryonics Works

Cryonics is a complex process that involves much more than just freezing a body. It starts with a legal declaration of death, followed by immediate cooling and stabilization to preserve the brain's structure. Then, the body's blood is replaced with a cryoprotectant solution, and the body is cooled to cryogenic temperatures for long-term storage. The goal is to preserve the body's cells in as close to their original state as possible, in the hope that future technologies will be able to repair any damage and revive the patient.

It's important to note that cryonics is not the same as cryogenics, which is the study of the behavior of materials at very low temperatures. While cryogenics is a well-established field of science, cryonics is still considered experimental and is not recognized by the mainstream medical community.

The Cryopreservation Process

The cryopreservation process begins immediately after a legal declaration of death. The body is cooled and given medications to protect the brain from damage. Then, it's transported to a cryonics facility, where the blood is replaced with a cryoprotectant solution to prevent ice formation. The body is then cooled to cryogenic temperatures and stored in a dewar, a large container filled with liquid nitrogen, for long-term preservation.

One of the key challenges in cryonics is minimizing damage to the body's cells during the freezing process. This is why the use of cryoprotectants is so important. These chemicals, which are similar to those used in the freezing of sperm and embryos, help to prevent ice formation and reduce cellular damage. However, they are not perfect, and some degree of damage is still inevitable.

Revival and Restoration

The ultimate goal of cryonics is to revive and restore patients to full health. However, this is currently beyond our technological capabilities. Cryonics advocates believe that future technologies, such as nanotechnology or advanced forms of regenerative medicine, may be able to repair the damage caused by the cryopreservation process and restore the patient to life.

It's important to note that this is a highly speculative area, and there is currently no scientific evidence to support the feasibility of revival. However, cryonics advocates argue that even a small chance of success is better than the certainty of death, and that cryonics should be seen as an experimental medical procedure rather than a guaranteed path to immortality.

Legal and Ethical Considerations

Cryonics raises a number of legal and ethical considerations. For one, there's the question of what constitutes death. In most jurisdictions, death is legally defined as the irreversible cessation of all brain function. However, cryonics advocates argue that this definition is outdated and that death should be seen as a process rather than a single event.

There are also questions about the rights of those in cryopreservation. For example, should they be considered legally dead, or should they have some form of legal status? And what about their property and assets - should these be held in trust until their potential revival? These are complex issues that have yet to be fully resolved.

Consent and Autonomy

One of the key ethical issues in cryonics is the question of consent. In most cases, individuals choose to undergo cryopreservation of their own free will. However, there have been cases where family members or legal guardians have made the decision on behalf of those who are unable to consent, such as children or those with severe cognitive impairments. This raises questions about autonomy and the right to make decisions about one's own body.

There are also concerns about the potential for coercion or undue influence, particularly in cases where individuals may feel pressured to undergo cryopreservation due to the beliefs or desires of family members or loved ones. This is why many cryonics organizations have strict protocols in place to ensure that the decision to undergo cryopreservation is made freely and without coercion.

Cost and Access

Cryonics is not cheap. The cost of cryopreservation can range from tens of thousands to hundreds of thousands of dollars, depending on the organization and the type of preservation (whole body vs. brain only). This raises questions about access and equity. Is it fair that only those who can afford it have the chance to potentially extend their lives?

Some cryonics advocates argue that the cost is justified, given the potential benefits. They also point out that many people spend similar amounts on other forms of healthcare or life extension, such as cosmetic surgery or expensive medications. However, critics argue that the high cost of cryonics, combined with the lack of scientific evidence for its effectiveness, makes it a questionable investment at best.

Future of Cryonics

The future of cryonics is uncertain. On one hand, advances in technology and medicine could make the dream of revival a reality. On the other hand, legal and ethical challenges, as well as public skepticism, could hinder the field's progress.

Despite the uncertainties, interest in cryonics continues to grow. More and more people are choosing to undergo cryopreservation, and research in the field is ongoing. So, while we may not be able to predict the future of cryonics, we can be sure that it will continue to spark debate and push the boundaries of what is possible in the realm of life extension.

Technological Advancements

Technological advancements could play a key role in the future of cryonics. For example, advances in nanotechnology could potentially be used to repair the damage caused by the cryopreservation process. Similarly, developments in regenerative medicine could potentially be used to restore function to damaged organs or tissues.

However, these technologies are still in their early stages, and it's unclear when or if they will be able to fulfill the promises of cryonics. In the meantime, research in cryonics continues, with scientists working to improve the cryopreservation process and minimize the damage to cells and tissues.

Public Perception and Acceptance

Public perception and acceptance of cryonics is another key factor in its future. Currently, cryonics is often viewed with skepticism, and many people see it as a fringe science or a form of pseudoscience. However, this perception could change as more research is conducted and as more people choose to undergo cryopreservation.

Education and outreach are also important for increasing public acceptance of cryonics. By providing accurate and balanced information about the procedure, its risks and benefits, and the scientific principles behind it, cryonics organizations can help to dispel myths and misconceptions and foster a more informed and nuanced discussion about the field.


So there you have it - a deep dive into the icy world of cryonics! From its history and how it works, to the legal and ethical considerations and the future of the field, we've covered it all. And while there's still a lot we don't know about cryonics, one thing is clear: it's a field that's not afraid to push the boundaries and challenge our understanding of life and death.

Whether you see cryonics as a viable path to life extension, a fascinating scientific experiment, or a flight of fancy, there's no denying that it's a topic that provokes thought and discussion. And who knows? Maybe one day, we'll look back on this era as the dawn of a new age in human longevity. But for now, we'll just have to wait and see what the future holds!

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