The term cryonics originates from the Greek word kryos, meaning “icy cold.” Cryonics is the process of preserving human bodies at extremely low temperatures with the hope of reviving them in the future. The concept hinges on the belief that if someone dies from an incurable disease today, they could be “frozen” and later revived when medical advancements offer a cure. This state of preservation is referred to as cryonic suspension.
To grasp the science behind cryonics, consider real-life stories of people who have fallen into icy lakes and remained submerged for nearly an hour before being rescued. In some cases, these individuals survived because the frigid water significantly slowed their metabolism and brain activity, placing their bodies into a form of suspended animation where oxygen demand was drastically reduced.
However, cryonics differs from such accidental preservation in significant ways. For one, it is illegal to perform cryonic suspension on living individuals. A person must first be declared legally dead—meaning their heart has stopped beating—before the process can begin. But if they’re dead, how can they ever be revived?