Scientists Explore Human Hibernation for Future Mars Missions

Global — Ekhbary News Agency

Scientists globally are actively pursuing the possibility of inducing human hibernation, a strategy that could fundamentally transform long-duration space travel, especially missions to Mars. Extended periods in space present formidable health challenges, including exposure to high radiation levels, detrimental effects of microgravity on organ systems, and severe psychological strain from confinement. Hibernation, a 250-million-year-old physiological adaptation observed in various animals, offers a potential solution by significantly reducing bodily functions and metabolic rates.

Mitigating Space Travel Hazards

As it happens, this remarkable biological state, where animals cease eating, drinking, and moving, appears to offer robust protection against many hazards of spaceflight. Research indicates that hibernation can shield against radiation exposure and prevent bone and muscle loss, critical concerns for astronauts. Furthermore, maintaining travelers in a prolonged unconscious state would alleviate the psychological burden of living in confined spaces for months or years. A significant logistical advantage is the drastic reduction in food and water requirements, decreasing payload weight and potentially shortening travel times to distant destinations like Mars.

Unlocking Nature's Secrets

The primary hurdle remains that humans are not natural hibernators. Unlike species such as ground squirrels, bears, and bats, our bodies haven't evolved to radically decrease metabolism in resource-scarce environments. Consequently, a growing international scientific community, with funding from entities like the European Space Agency (Esa) and Nasa, is dedicated to developing safe methods for inducing hibernation in humans. Christiane Hahn, who oversees space biology research at Esa, affirms, "This is a very promising area. It could absolutely transform the future of space travel."

Radiation Protection and DNA Repair

Radiation poses a particular threat during long-haul space voyages, as Earth's atmosphere provides protection absent in space. Animals in hibernation reduce metabolic activity, consume less oxygen, and tightly pack their DNA strands, all contributing to radiation damage protection. Elena Gracheva, a Yale University physiologist studying 13-lined ground squirrels, highlights their "incredible" capabilities. She notes these animals can survive without water for up to eight months while hibernating, with heart rates dropping to one beat every several minutes and body temperatures reaching 4C. Gracheva's research has identified a brain area, the subfornical organ (SFO), present in humans, that regulates thirst suppression during hibernation, offering a potential pathway for human induction.