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the claim
Humans can travel into outer space
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
12 sources for · 0 against

Extensive empirical research, historical occupational data, and physiological studies of human spaceflight confirm that humans can travel into outer space.

Evidence for · 12
The NASA Twins Study: A multidimensional analysis of a year-long human spaceflight
2019 · cited by 948
Garrett-Bakelman et al. (2019) examine molecular and physiological traits in twin astronauts, noting that hundreds of humans have flown into space.
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The analysis

The claim that humans can travel into outer space is directly supported by all provided literature, which analyzes physiological and medical data from hundreds of astronauts who have flown into space (e.g., Garrett-Bakelman et al., 2019; NASA Astronaut Cohort Profile, 2026). There is no refuting evidence in the retrieved sources.

More for · 11
Gravity, Microgravity and Artificial Gravity: Physiological Effects, Implementation and Applications.
2025 · cited by 12
Gravity, Microgravity and Artificial Gravity (2025) discusses physiological effects of spaceflight and microgravity on the human body.
Human Physiological Limitations to Long-Term Spaceflight and Living in Space
2023 · cited by 12
Winkler (2023) reviews physiological limitations and human habitation in space, noting historical crewed missions.
Use of galvanic vestibular stimulation device as a countermeasure for microgravity effects in spaceflight
2024 · cited by 7
Use of galvanic vestibular stimulation device (2024) discusses challenges and countermeasures for human spaceflight missions.
Physiological Effects of Centrifuge-Simulated Suborbital Spaceflight.
2022 · cited by 6
Smith et al. (2022) evaluate physiological effects of centrifuge-simulated suborbital spaceflight on human participants.
Physiological Effects of Spaceflight/Unloading and the Mitigating Effects of Flywheel-Based Resistive Exercise
2016 · cited by 2
Physiological Effects of Spaceflight/Unloading (2016) addresses countermeasures for musculoskeletal losses during manned spaceflight missions.
Understanding Spaceflight-Induced Oxidative Stress and the Critical Role of Diet and Microbiome.
2026 · cited by 1
Understanding Spaceflight-Induced Oxidative Stress (2026) reviews environmental stressors experienced by astronauts during spaceflight.
Multimodal Imaging-Based Cerebral Blood Flow Prediction Model Development in Simulated Microgravity.
2025 · cited by 1
Multimodal Imaging-Based Cerebral Blood Flow Prediction (2025) assesses blood flow changes in participants undergoing microgravity analogs for spaceflight.
Space exploration and lifestyle medicine: a narrative review of its implications for astronaut health and remote Earth-based environments.
2025 · cited by 1
Space exploration and lifestyle medicine (2025) highlights health challenges faced by astronauts during long-duration space missions.
Spaceflight Standard Measures is a multidisciplinary study that systematically monitors risks to astronaut health and performance.
2025 · cited by 1
Spaceflight Standard Measures (2025) systematically monitors health and performance metrics across crewmembers on spaceflight missions.
Unravelling the Impact of Microgravity on Calcium Ion Signaling and Sensorium in Spaceflight.
2026 · cited by 0
Unravelling the Impact of Microgravity (2026) discusses physiological adaptations of humans during spaceflight in microgravity.
Astronauts of the US National Aeronautics and Space Administration (NASA): cohort profile.
2026 · cited by 0
NASA Astronaut Cohort Profile (2026) details the occupational cohort of 360 astronauts selected by NASA who have experienced spaceflight exposures.
Everything we examined (12)
We also searched for evidence AGAINST this claim, not only for it.
  1. The NASA Twins Study: A multidimensional analysis of a year-long human spaceflightpeer-reviewedsupports
  2. Gravity, Microgravity and Artificial Gravity: Physiological Effects, Implementation and Applications.peer-reviewedsupports
  3. Human Physiological Limitations to Long-Term Spaceflight and Living in Spacepeer-reviewedsupports
  4. Use of galvanic vestibular stimulation device as a countermeasure for microgravity effects in spaceflightpeer-reviewedsupports
  5. Physiological Effects of Centrifuge-Simulated Suborbital Spaceflight.peer-reviewedsupports
  6. Physiological Effects of Spaceflight/Unloading and the Mitigating Effects of Flywheel-Based Resistive Exercisepeer-reviewedsupports
  7. Understanding Spaceflight-Induced Oxidative Stress and the Critical Role of Diet and Microbiome.peer-reviewedsupports
  8. Multimodal Imaging-Based Cerebral Blood Flow Prediction Model Development in Simulated Microgravity.peer-reviewedsupports
  9. Space exploration and lifestyle medicine: a narrative review of its implications for astronaut health and remote Earth-based environments.peer-reviewedsupports
  10. Spaceflight Standard Measures is a multidisciplinary study that systematically monitors risks to astronaut health and performance.peer-reviewedsupports
  11. Unravelling the Impact of Microgravity on Calcium Ion Signaling and Sensorium in Spaceflight.peer-reviewedsupports
  12. Astronauts of the US National Aeronautics and Space Administration (NASA): cohort profile.peer-reviewedsupports
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → SUPPORTED · 9405 Aug 2026
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