Scientists test human hibernation for Mars missions
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- NASA and ESA are funding a global push to develop synthetic torpor, with ESA space biology chief Christiane Hahn calling it a field that "could absolutely transform the future of space travel."
- Yale's Elena Gracheva identified the subfornical organ (SFO) in 13-lined ground squirrels and a molecule that abolishes thirst during hibernation — squirrels she studies can go up to eight months without water, even when it's offered.
- University of Bologna's Matteo Cerri has induced synthetic torpor via invasive surgery targeting the raphe pallidus brain region; since 2023, researchers at Washington University in St. Louis have achieved the same with noninvasive ultrasound, and Cerri plans to test that approach in healthy human volunteers.
- MIT's Siniša Hrvatin activated neurons in the preoptic area of hamsters and dropped their body temperature to 15°C; the neural circuit appears conserved across species, including non-hibernators, raising hopes it could be triggered in humans.
- University of Pittsburgh's Clifton Callaway gave healthy humans the sedative dexmedetomidine for five days, producing a 20% drop in metabolic rate and a 30% decrease in calorie consumption — modest, but enough to trim the roughly 300kg of food needed per Mars-bound astronaut.
- University of Groningen researchers isolated the molecule SUL-138 from Syrian hamsters and have launched a small human trial in Parkinson's patients, with parallel work exploring cancer, Alzheimer's, heart failure, obesity and trauma care.
Why it matters: The science is no longer hypothetical — Callaway's NASA-funded study already lowered human metabolism 20% and calorie use 30% with an existing sedative, and Groningen has begun a Parkinson's trial with a hibernation-derived molecule. Even a partial metabolic slowdown could meaningfully cut the 300kg of food per Mars astronaut and the years-long radiation exposure that currently makes interplanetary travel medically prohibitive.
