July 21, 2024

Space Travel May Affect Cognitive Abilities

Journeying to outer space can be a mind-expanding adventure, offering a fresh perspective on the human race and its position in the universe. While one might assume that such an experience would make an individual immensely knowledgeable, a recent report has revealed that space travel could potentially have a detrimental effect on cognitive abilities.

As more individuals embark on space travel through private missions like those conducted by Blue Origin, scientists have seized the opportunity to study the effects of space travel on regular people. The influx of wealthy individuals and former actors venturing into space offers a unique chance to observe how non-astronauts react to the rigors of space flight compared to trained spacefarers.

A recent report by the New York Times has unveiled the repercussions of such space journeys, indicating potential negative impacts on brain function, the immune system, and overall physical well-being. The study focused on the four privateer astronauts of the 2021 Inspiration4 mission, revealing that even brief periods in orbit can have adverse effects. According to the Times:

Four individuals who spent three days away from Earth in September 2021 experienced changes in both physical and mental capabilities, including slight decreases in cognitive performance, heightened stress on the immune system, and genetic alterations within their cells. These findings were published in various journals, including Nature, on Tuesday.

Most of the observed changes reverted to normal upon the astronauts’ return to Earth. While these alterations did not pose significant risks for future space travelers, they underscore the gaps in our medical knowledge.

During a press conference, Christopher Mason, a genomics, physiology, and biophysics professor at Weill Cornell Medicine in New York City and a key figure in the study, referred to the gathered data as “the most comprehensive analysis ever conducted on a space crew”.

The selection of four diverse individuals, including billionaire Jared Isaacman, mission leader; Hayley Arceneaux, a physician assistant; Sian Proctor, a community college professor; and Christopher Sembroski, an engineer, aimed to represent a broader segment of society. However, the researchers anonymized the data of each participant from the Inspiration4 mission.

Billionaire Jared Isaacman funded the Inspiration4 mission.
Photo: PATRICK T. FALLON/AFP (Getty Images)

Throughout their space voyage, from pre-launch preparations to post-landing activities, the participants provided researchers with various samples, including blood, urine, and cognitive data obtained through specialized tasks.

Analysis of the collected data revealed that kidney function was impacted by space travel, increasing the likelihood of kidney stone formation, while genetic markers associated with aging were altered, suggesting a rejuvenating effect in space, as detailed in a paper published in Nature. The team also assessed the crew’s ability to concentrate and sustain focus while in space. According to the Times:

The astronauts underwent several tests on iPads to evaluate their cognitive performance in space. One test focused on psychomotor vigilance, measuring the ability to concentrate on a task and maintain attention. The astronauts had to fixate on a box displayed on the screen, with a stopwatch suddenly appearing within the box to time their response.

A response time exceeding 355 milliseconds was considered an attention lapse. On average, the astronauts’ performance in space showed a decline compared to when they took the same test on solid ground. Other evaluations highlighted deficits in visual search and working memory.

The study indicated a decrease in response times while in space, although the researchers acknowledged that this could be attributed to distractions caused by the awe-inspiring view of the cosmos.

Despite the study’s limited scope, such research will play a crucial role as space travel becomes more accessible in the years ahead. Findings like these could assist programs such as Nasa’s Artemis mission in developing protocols and manuals for individuals in space, influencing the design of next-generation space habitats.

Frequently Asked Questions

1. How does space travel affect cognitive abilities?

Space travel can potentially lead to slight declines in cognitive performance, as observed in astronauts participating in the Inspiration4 mission.

2. What are some physiological changes experienced during space travel?

Physiological changes include alterations in kidney function, genetic markers associated with aging, and potential impacts on the immune system.

3. How can research on space travelers benefit future missions?

Insights from studies on space travelers can aid in the development of safety protocols, medical guidelines, and habitat design for future space missions.


The exploration of space offers unique opportunities for scientific research, but it also presents challenges in understanding the impact of extended space travel on human health and cognitive abilities. The recent findings from the Inspiration4 mission shed light on the potential effects of space journeys on individuals from various backgrounds. As space tourism becomes more prevalent, continued research and analysis will be essential in ensuring the well-being and success of future space travelers.

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