Researchers at New York University found that the human genome maintains structural stability and suffers no detectable double-strand DNA breaks after 24 hours in simulated microgravity. The discovery, announced on Wednesday, September 23, 2026, demonstrates that the internal mechanical organization of human genetic material remains intact during daylong weightlessness, paving the way for targeted medical research into artificial gravity doses for astronauts and clinical rehabilitation on Earth.
- Human cell nuclei endured 24 hours of simulated weightlessness without detectable DNA damage or nuclear membrane disruption.
- New York University physicists used a custom random-positioning machine that cancelled destructive fluid currents during rotation.
- The genetic findings support clinical trials and centrifuge programs investigating artificial gravity doses for rehabilitation and deep-space travel.
The study, published in the journal Science Advances, focused on isolating the exact physical effect of gravity on cellular architecture. “Our data show that the genome, its organization, and dynamics are incredibly robust and seem unaffected by gravity, or lack thereof, after 24 hours,” said Alexandra Zidovska, an associate professor of physics at New York University and senior coordinator of the project.
What happens to human DNA when Earth gravity is removed?
Inside every human cell nucleus, roughly two meters of linear DNA molecules remain tightly folded into a sphere measuring only about 10 micrometers across. Because gravity exerts an uninterrupted mechanical pull on terrestrial organisms, scientists sought to measure whether weightlessness forces this dense architecture to unravel or mutate. Lead author Nikitas Kanellakopoulos and senior investigator Alexandra Zidovska designed an experiment to test how living human cells behave when this baseline force disappears entirely.
Follow: Lunar Reconnaissance Orbiter logs 222-meter McGetchin crater
“On Earth, the role of gravity is intriguing—it is a constant mechanical stress on everything. We wanted to know what gravity’s role is in the genome’s organization and function here on Earth. To uncover it, you have to remove gravity as a force so we simulated zero gravity in our experiments,” Zidovska explained. Over the full 24-hour testing cycle, the nuclear envelope stayed intact, and the spatial dynamics of the chromatin remained steady without experiencing an increase in double-strand breaks.
Read also: Saturn reveals massive 10-sided wave at south pole in Hubble data
Custom engineering eliminated deceptive fluid currents in laboratory testing
To simulate weightlessness on the ground, the New York University team built a specialized random-positioning machine that rotated cell cultures along two independent axes. In conventional rotary experiments, the continuous motion generates strong internal fluid currents that push against biological samples. By writing custom algorithms that continually counteracted these mechanical shear flows, the researchers isolated the absence of gravitational orientation from secondary hydrodynamic friction.
Keep reading: Perseverance finds organic carbon inside rocks at Jezero
This technical separation proved decisive in resolving contradictions from earlier scientific literature. When the researchers intentionally turned off the algorithmic corrections and exposed the cultures to intense fluid flows, the cells stretched out and suffered clear DNA damage. The test proved that structural damage reported in past microgravity trials was caused by fluid friction inside laboratory equipment rather than weightlessness itself. Under true isolated microgravity, the cell nucleus expanded in volume, while the nucleolus adopted a smoother exterior surface because of the absence of internal nucleoplasmic convection and buoyancy.
Learn more: Long-lived magnetic waves could make tiny quantum computers a reality
Key facts of the New York University microgravity experiment
- Lead institution: New York University Department of Physics in New York, United States
- Primary authors: Nikitas Kanellakopoulos and Alexandra Zidovska
- Scientific publication: Science Advances, volume 12, number 39, paper eaeh3116, released online on September 23, 2026
- Supporting agencies: National Science Foundation and National Institutes of Health
- Experimental duration: 24 hours under active microgravity simulation across two independent axes of rotation
- Biological scale examined: two meters of human DNA stored within a nucleus measuring 10 micrometers in diameter
From space exploration to clinical rehabilitation on Earth
The validation of cellular stability under controlled gravity supports a broader movement in medicine that treats gravitational force as a tunable prescription. Understanding how human tissues react to fractional gravity is essential for long-term lunar and Martian exploration, where surface gravities equal approximately one-sixth and three-eighths of Earth’s pull, respectively. Ground-based facilities are now quantifying biological thresholds to determine how much artificial pull is required to keep human organs functioning normally during long interplanetary transit.
See also: Pioneer of the human genome, John Craig Venter dies at age 79
Medical researchers are also testing whether the same mechanical forces can treat severe physiological conditions on Earth. The ongoing GRACER1 clinical trial evaluates the combination of artificial gravity and prescribed physical exercise to stimulate motor and neurological recovery in patients recovering from stroke or managing multiple sclerosis. Similar bed-rest studies conducted in Europe, designated BRACE and BRAVE, pair human centrifuges with exercise regimens to prevent bone and muscle deterioration. In the United States, NASA-funded Gravity Dose research at Texas A&M University uses human centrifuges to test exact physical limits under lunar and Martian gravitational profiles.
Despite the demonstrated 24-hour genomic resilience, scientists emphasize that current data cannot predict cell survival across long missions. “Such changes could occur during longer exposures and due to DNA damage occurring in space,” Zidovska said. It is still not known how long the genome maintains its resilience beyond 24 hours, nor how cells will handle cumulative exposure to combined microgravity and deep-space cosmic radiation.
Future spaceflight programs plan to extend algorithmic cell simulations to longer timelines and deploy automated biological payloads to evaluate deep-space travel.