The Contrasting Survival Strategies of Insects and Mammals in Cold Weather
Surviving cold weather poses unique challenges for insects and mammals, as their approaches differ significantly. While mammals, such as bears and squirrels, never fully freeze, insects and amphibians are capable of literal freezing, rendering them unable to quickly revive. A hibernating bear, for instance, maintains a warm body temperature and can swiftly awaken from its dormant state. Although the metabolism of mammals slows during hibernation, it never comes to a complete halt. Interestingly, the techniques of cryogenics draw inspiration from the adaptive freezing mechanisms observed in insects, as it explores the possibility of freezing human bodies for preservation purposes.
Arguments Against Cryonics
There are several scientists who are skeptical of cryonics and do not consider it a legitimate scientific field. They argue that freezing a human body and preserving it is not possible without causing irreversible damage. One of the main points raised by opponents is the fact that hibernating mammals, which naturally enter a state of suspended animation, cannot survive cryonic suspension.
Researchers in the field of cryogenics have faced challenges in trying to adapt mammalian hibernation mechanisms for cryonic preservation. Unlike insects, mammals have a highly complex circulatory system with intricate blood vessels. Insects, on the other hand, possess an open circulatory system and their blood cells differ significantly from those found in humans and other mammals.